Database of the Geologic Map of North America- Adapted from the Map by J.C. Reed, Jr. and others (2005)

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Garrity, C.P.
Originator: Soller, D.R.
Publication_Date: 2009
Publication_Time: Unknown
Title:
Database of the Geologic Map of North America- Adapted from the Map by J.C. Reed, Jr. and others (2005)
Edition: 1.0
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: Data Series
Issue_Identification: 424
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: <https://pubs.usgs.gov/ds/424>
Description:
Abstract:
This map layer contains geologic unit boundaries for the area depicted in the Geologic Map of North America, published by the Geological Society of America in 2005 (Reed et. al, 2005). Digital data were compiled from source data at a scale of 1:5,000,000 and are not intended to be used at a larger (greater detail) scale.
Purpose:
The release of this database will allow the general public, academia, and earth science professionals to view, evaluate and manipulate geologic data on a continental scale. It is hoped that use of this data, either by itself or in relation to other data sets, may lead to new interpretations of the geology of North America.
Supplemental_Information:
The comprehensive list of contributors to the Geologic Map of North America (Reed and others, 2005) is available on request from Documents Secretary, Geological Society of America, P.O. Box 9140, Boulder, CO 80301-9140, USA, editing@geosociety.org, or at <ftp://rock.geosociety.org/pub/reposit/2005/2005019.pdf>.
Users who wish to display the geologic map symbolization and color palettes similar to those used in the printed version of the GMNA are encouraged to open the map document (GMNA.mxd) in ArcMap. All map symbology was created to be used at a scale of 1:5,000,000. The following fonts are used as character markersets in the map document:
Arial MT (ARIAL.TTF)
Georgia (GEORGIA.TTF)
ESRI Caves 2 (ESRI_376.TTF)
ESRI Default Marker (ESRI_11.TTF)
ESRI Enviro Hazard Sites (ESRI_802.TTF)
ESRI Geology USGS 95-525 (ESRI_400.TTF)
ESRI Geometric Symbols (ESRI_3.TTF)
ESRI Oil, Gas, & Water (ESRI_4.TTF)
ESRI Pipeline US 1 (ESRI_161.TTF)
ESRI Telecom (ESRI_160.TTF)
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20080115
Time_of_Day: unknown
Currentness_Reference: publication date
Status:
Progress: Planned
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -180.000000
East_Bounding_Coordinate: 180.000000
North_Bounding_Coordinate: 90.000000
South_Bounding_Coordinate: 5.676566
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: Geoscientific Information
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Geologic Map of North America
Theme_Keyword: GMNA
Theme_Keyword: Geologic Map
Theme_Keyword: Geology
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: North America
Place_Keyword: United States
Place_Keyword: Canada
Place_Keyword: Alabama
Place_Keyword: Alaska
Place_Keyword: Arizona
Place_Keyword: Arkansas
Place_Keyword: California
Place_Keyword: Colorado
Place_Keyword: Connecticut
Place_Keyword: Delaware
Place_Keyword: District of Columbia
Place_Keyword: Florida
Place_Keyword: Georgia
Place_Keyword: Hawaii
Place_Keyword: Idaho
Place_Keyword: Illinois
Place_Keyword: Indiana
Place_Keyword: Iowa
Place_Keyword: Kansas
Place_Keyword: Kentucky
Place_Keyword: Louisiana
Place_Keyword: Maine
Place_Keyword: Maryland
Place_Keyword: Massachusetts
Place_Keyword: Michigan
Place_Keyword: Minnesota
Place_Keyword: Mississippi
Place_Keyword: Missouri
Place_Keyword: Montana
Place_Keyword: Nebraska
Place_Keyword: Nevada
Place_Keyword: New Hampshire
Place_Keyword: New Jersey
Place_Keyword: New Mexico
Place_Keyword: New York
Place_Keyword: North Carolina
Place_Keyword: North Dakota
Place_Keyword: Ohio
Place_Keyword: Oklahoma
Place_Keyword: Oregon
Place_Keyword: Pennsylvania
Place_Keyword: Rhode Island
Place_Keyword: South Carolina
Place_Keyword: South Dakota
Place_Keyword: Tennessee
Place_Keyword: Texas
Place_Keyword: Utah
Place_Keyword: Vermont
Place_Keyword: Virginia
Place_Keyword: Washington
Place_Keyword: West Virginia
Place_Keyword: Wisconsin
Place_Keyword: Wyoming
Place_Keyword: Puerto Rico
Place_Keyword: Virgin Islands
Place_Keyword: U.S. Virgin Islands
Place_Keyword: Mexico
Place_Keyword: Central America
Place_Keyword: South America
Access_Constraints: None
Use_Constraints:
This digital publication was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data published in this Data Series have been used by the USGS, no warranty, expressed or implied, is made by the U.S. Geological Survey as to the accuracy of the data and related materials and/or the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of this data, software, or related materials. Graphical map depictions are intended to be used within the map scale limits applicable to the source data. Although software enables the user to view data at various scales, the user is cautioned to refer to the source documentation for the appropriate map scale limitations.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: David Soller
Contact_Organization: U.S. Geological Survey
Contact_Position: Project Chief, National Geologic Map Database
Contact_Address:
Address_Type: physical address
Address: MS 926-A National Center
City: Reston
State_or_Province: VA
Postal_Code: 20192
Country: USA
Contact_Voice_Telephone: 703-648-6907
Contact_TDD/TTY_Telephone: 703-648-6907
Contact_Facsimile_Telephone: 703-648-6977
Contact_Electronic_Mail_Address: drsoller@usgs.gov
Hours_of_Service: 9:00AM - 6:00PM
Contact_Instructions: Preferred contact method is electronic mail.
Security_Information:
Security_Classification_System: None
Security_Classification: Unclassified
Security_Handling_Description: None
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.6.1500
Cross_Reference:
Citation_Information:
Originator: Reed, J.C. Jr.
Originator: Wheeler, J.O.
Originator: Tucholke, J.E.
Publication_Date: 2005
Publication_Time: Unknown
Title: Geologic Map of North America
Edition:
Geological Society of America, DNAG Continent-Scale Map 001. Scale: 1:5,000,000
Geospatial_Data_Presentation_Form: map
Other_Citation_Details:
3 sheets (North, South, and Legend), approximately 74 x 40 inches.
Online_Linkage:
<http://rock.geosociety.org/bookstore/default.asp?oID=0&catID=12&pID=CSM001R>
Online_Linkage: <ftp://rock.geosociety.org/pub/reposit/2005/2005019.pdf>
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Attribute accuracy was tested by manual comparison of the source with hard copy printouts and/or symbolized display of the digital geologic data on an interactive computer graphic system. In addition, attributes were compared to a master set of valid geologic unit attributes.
Logical_Consistency_Report:
Topological accuracy was tested using topology validation tools via ArcGIS 9.2. Specific errors that were checked included: Polygon overlaps and gaps, coincident contact lines and geologic unit borders, self overlapping lines and superfluous pseudo nodes. No duplicate features exist nor duplicate points in a data string. Intersecting lines are separated into individual line segments at the point of intersection. Feature classes in the geodatabase are topologically clean.
Completeness_Report:
Data set complete. No data was intentionally omitted from the hard copy source map.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Unsystematic registration errors at latitude-longitude intersections were observed throughout the printed version of the GMNA when overlain by computer generated graticules, particularly near the polar regions of the map. The amount of offset varied throughout the map, with a maximum offset estimated at about 4 km in certain high latitude areas.
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Explanation:
It is likely that offset was introduced in the numerous iterations (and numerous technological changes in cartographic production) of the GMNA over its twenty year history of compilation.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report: Not applicable.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Reed, J.C. Jr.
Originator: Wheeler, J.O.
Originator: Tucholke, B.E.
Publication_Date: 2005
Publication_Time: Unknown
Title: Geologic Map of North America
Edition:
Decade of North American Geology Continental Scale Map 001. Scale: 1:5,000,000
Geospatial_Data_Presentation_Form: map
Other_Citation_Details:
3 sheets (North, South, and Legend), approximately 74 x 40 inches.
Online_Linkage:
<http://rock.geosociety.org/bookstore/default.asp?oID=0&catID=12&pID=CSM001R>
Online_Linkage: <ftp://rock.geosociety.org/pub/reposit/2005/2005019.pdf>
Source_Scale_Denominator: 5,000,000
Type_of_Source_Media: paper
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2005
Time_of_Day: unknown
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Source_Contribution: Hard copy of the Geologic map of North America.
Process_Step:
Process_Description:
Adobe Illustrator files containing the linework used for the hard copy production of the Geologic Map of North America (GMNA) were obtained from USGS cartographers in Reston, VA. The two (northern and southern) Illustrator source files were massive, with layer counts totaling over 1,500 each. Files were analyzed to determine if direct import from Adobe Illustrator to ArcGIS (via software like MaPublisher) would be the most efficient method of file conversion. When examined at scales far more detailed than that of the printed map, many areas were found to have problems in topological relationships. Common topological problems in these areas included polygons that overlapped or had gaps between them, overlying line layers (contacts, faults, etc.) which were not coincident with polygon boundaries, and line features that self-overlapped. Although these problems were irrelevant to preparation of the hard copy map, they were unsuitable for feature class generation. To minimize topological errors (estimated in the hundreds of thousands), features were created via a combination of direct export from Illustrator and raster auto-vectorization. Layers containing linework coincident with geologic unit boundaries were batch exported from Illustrator with the exception of the geologic contacts layer. The geologic contact layer was exported as a series of high-resolution monochrome tiles. Raster tiles exported from Adobe Illustrator were georeferenced to local geographic coordinate positions using control points in the DNAG projection (Snyder, 1987). Images were auto-vectorized using ArcScan. Gaps and overlaps between tiles were rectified via raster painting tools. To create a topologically clean layer, topology rules were set in ArcMap and line dangles in the newly vectorized layer were snapped to the nearest unit-bordering line features. Geologic unit layers were batch exported from the source Illustrator files and used as overlays for attributing the newly created polygon feature class. Through spatial querying, polygons in the unattributed layer that had their center within a specific overlay layer were attributed based on the overlay's geologic unit abbreviation. Remaining attribution for all other fields was completed quickly through VBA field calculator scripting based on the populated unit abbreviation field. Feature class symbolization was created to closely resemble the printed version of the GMNA. Finally, feature class symbology was exported to layer and style files.
Source_Used_Citation_Abbreviation: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Process_Date: 2007
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Christopher Garrity
Contact_Organization: U.S. Geological Survey
Contact_Position: Cartographer
Contact_Address:
Address_Type: mailing and physical address
Address: 12201 Sunrise Valley Drive
Address: Mail Stop 956
City: Reston
State_or_Province: VA
Postal_Code: 20192
Country: USA
Contact_Voice_Telephone: 703-648-6426
Contact_TDD/TTY_Telephone: 703-648-6426
Contact_Facsimile_Telephone: 703-648-6419
Contact_Electronic_Mail_Address: cgarrity@usgs.gov
Hours_of_Service: 9:00AM - 6:00PM
Contact_Instructions: Preferred contact method is electronic mail.
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: G-polygon
Point_and_Vector_Object_Count: 39828
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: Transverse Mercator
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.926000
Longitude_of_Central_Meridian: -100.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 0.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.000100
Ordinate_Resolution: 0.000100
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: D_User_Defined
Ellipsoid_Name: User_Defined_Spheroid
Semi-major_Axis: 6371204.000000
Denominator_of_Flattening_Ratio: infinity
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Resolution: 0.000100
Altitude_Encoding_Method:
Explicit elevation coordinate included with horizontal coordinates
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: Geologic_units
Entity_Type_Definition:
Geologic unit polygons. Units are defined on the basis of age, origin, and where possible, composition.
Entity_Type_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute:
Attribute_Label: OBJECTID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: UNIT_ABBREV
Attribute_Definition:
Geologic unit abbreviation. Generally used for map labeling purposes.
Attribute_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Unrepresentable_Domain:
Unit ages are indicated by uppercase letters and by lowercase letters and/or numbers preceding them. The lowercase letters and numbers indicate subdivisions of time-stratigraphic units. For a detailed description of how value definitions were constructed see the Entity_and_Attribute_Overview section of the metadata.
Attribute:
Attribute_Label: ROCKTYPE
Attribute_Definition: Main classes into which rocks are divided.
Attribute_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Sedimentary
Enumerated_Domain_Value_Definition:
A rock resulting from the consolidation of loose sediment that has accumulated in layers; e.g. a clastic rock consisting of mechanically formed fragments of older rock transported from its source and deposited in water or from air or ice; or a chemical rock formed by precipitation from solution; or an organic rock consisting of the remains or secretions of plants and animals.
Enumerated_Domain_Value_Definition_Source:
Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Plutonic
Enumerated_Domain_Value_Definition:
A rock formed at considerable depth by crystallization of magma and/or by chemical alteration. It is characteristically medium-to coarse-grained, of granitoid texture.
Enumerated_Domain_Value_Definition_Source:
Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Volcanic
Enumerated_Domain_Value_Definition:
A generally finely crystalline or glassy igneous rock resulting from volcanic action at or near the Earth's surface, either ejected explosively or extruded as lava. The term includes near-surface intrusions that form a part of the volcanic structure.
Enumerated_Domain_Value_Definition_Source:
Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Metamorphic and undivided crystalline
Enumerated_Domain_Value_Definition:
A rock derived from pre-existing rocks by mineralological, chemical, and/ or structural changes, essentially in the solid state, in response to marked changes in temperature, pressure, shearing stress, and chemical environment, generally at depth in the Earth's crust. Unit can also include plutonic rock (defined elsewhere).
Enumerated_Domain_Value_Definition_Source:
Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute:
Attribute_Label: LITHOLOGY
Attribute_Definition: Lithologic descriptions of non-sedimentary rocks.
Attribute_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Alkaline complex
Enumerated_Domain_Value_Definition: Rock mass made up largely or entirely of alkalic igneous rocks.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Alkaline diorite gabbro and syenite
Enumerated_Domain_Value_Definition: Alkaline suite composed of diorites, gabbros, and syenites.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Alkaline mafic and intermediate rocks
Enumerated_Domain_Value_Definition:
Mafic and intermediate rocks that have relatively high values of total alkali minerals.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Alkaline mafic rocks
Enumerated_Domain_Value_Definition:
Mafic rocks that have relatively high values of total alkali minerals.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Alkaline rocks
Enumerated_Domain_Value_Definition:
Any igneous rock in which the molecular ratio [(Na2O + K2O): Al2O3:SiO2] differs from 1:1:6 by deficiency in either Al2O or SiO2.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Anorthosite
Enumerated_Domain_Value_Definition:
A plutonic rock with a plagioclase feldspar component greater than 90%, a quartz component between 0 and 5%, and a mafic component less than 10%.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Bimodal rocks (mafic and alkaline mafic)
Enumerated_Domain_Value_Definition:
Rocks with subequal percentages of mafic and alkaline mafic components.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Charnockite
Enumerated_Domain_Value_Definition:
An orthopyroxene-bearing granite. Most classifications require that quartz constitute at least 20% of the felsic constituents and that the ratio of alkali feldspar to total feldspar fall between 40% and 90%.
Enumerated_Domain_Value_Definition_Source:
Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Diabase
Enumerated_Domain_Value_Definition:
An intrusive rock whose main components are labradorite and pyroxene and which is characterized by ophitic texture.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Early tonalite plutons in the Superior province
Enumerated_Domain_Value_Definition:
Plutons in the Superior province that are composed of tonalite, a light-colored coarse-textured, intrusive igneous rock containing more than 20% quartz.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Felsic and intermediate rocks
Enumerated_Domain_Value_Definition:
Map unit contains felsic (defined elsewhere) and intermediate (defined elsewhere) rocks.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Felsic and mafic rocks
Enumerated_Domain_Value_Definition:
Map unit contains felsic (defined elsewhere) and mafic (defined elsewhere) rocks.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Felsic rocks
Enumerated_Domain_Value_Definition:
Igneous rock having abundant light-colored minerals in its mode. Felsic is a mnemonic adjective derived from feldspar + lenad (feldspathoid) +silica + c.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Felsite
Enumerated_Domain_Value_Definition:
A general term for any light-colored, fine-grained or aphanitic extrusive or hypabyssal rock, with or without phenocrysts and composed chiefly of quartz and feldspar; a rock characterized by felsitic texture.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Gabbro-anorthosite
Enumerated_Domain_Value_Definition:
Composed of gabbroic rock (a group of dark-colored, coarse-grained, basic intrusive igneous rocks composed mostly of calcic plagioclase and clinopyroxene) and anorthositic rock (coarse-grained igneous rock composed mostly of plagioclase and lesser amounts of pyroxene).
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Granite
Enumerated_Domain_Value_Definition:
Light-colored plutonic rocks composed chiefly of quartz and feldspar and small amounts of mica, hornblende, and other minerals.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Impact breccia
Enumerated_Domain_Value_Definition:
A coarse-grained rock composed of angular broken rock fragments, produced by an impact event such as a meteorite striking the earth.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Interlayered sedimentary and alkaline volcanic rocks
Enumerated_Domain_Value_Definition:
Map unit contains interlayered sedimentary and alkaline (defined elsewhere) volcanic rocks.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Interlayered sedimentary and mafic volcanic rocks
Enumerated_Domain_Value_Definition:
Map unit contains interlayered sedimentary and mafic (defined elsewhere) volcanic rocks.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Interlayered sedimentary and volcanic rocks
Enumerated_Domain_Value_Definition: Map unit contains interlayered sedimentary and volcanic rocks.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Intermediate and mafic rocks
Enumerated_Domain_Value_Definition:
Map unit contains intermediate (defined elsewhere) and mafic (defined elsewhere) rocks.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Intermediate rocks
Enumerated_Domain_Value_Definition:
Medium- to dark-gray plutonic or volcanic rocks composed of roughly equal amounts of quartz, feldspar, mica, and hornblende.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Late felsic and intermediate plutons in the Superior province
Enumerated_Domain_Value_Definition:
Plutons in the Superior province that are composed felsic and intermediate (defined elsewhere) intrusive igneous rocks.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Mafic and ultramafic rocks
Enumerated_Domain_Value_Definition:
Map unit contains mafic (defined elsewhere) and ultramafic (defined elsewhere) rocks.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Mafic rocks
Enumerated_Domain_Value_Definition:
Said of dark-colored plutonic or volcanic rocks composed chiefly of feldspar and dark minerals rich in iron and magnesium, such as hornblende, pyroxene, and olivine, and containing little or no quartz.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Mainly tonalite gneiss
Enumerated_Domain_Value_Definition:
A coarse-textured, metamorphic rock that originated as a light-colored plutonic (intrusive) rock containing more than 20% quartz.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Marble
Enumerated_Domain_Value_Definition:
A metamorphic rock consisting predominantly of fine-to coarse-grained recrystallized calcite and/or dolomite.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Orthogneiss
Enumerated_Domain_Value_Definition: A gneiss formed from igneous rocks.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Paragneiss
Enumerated_Domain_Value_Definition: A gneiss formed from sedimentary rocks.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Quartzite (Early Proterozoic)
Enumerated_Domain_Value_Definition:
A granoblastic metamorphic rock consisting mainly of quartz and formed by recrystallization of sandstone or chert by either regional or thermal metamorphism.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Sedimentary and volcanic gneiss
Enumerated_Domain_Value_Definition: A gneiss of sedimentary and/or volcanic origin.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Syenite gneiss
Enumerated_Domain_Value_Definition:
A coarse-textured, metamorphic rock that originated as a plutonic (intrusive) rock containing alkali feldspar (usually orthoclase, microcline, or perthite), a small amount of plagioclase (less than in monzonite), one or more mafic minerals (esp. amphibole), and quartz, if present, only as an accessory.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Syenite, monzogranite
Enumerated_Domain_Value_Definition:
An intrusive rock containing alkali feldspar (usually orthoclase, microcline, or perthite), plagioclase, one or more mafic minerals (esp. amphibole), and quartz, if present, only as an accessory.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Tonalite
Enumerated_Domain_Value_Definition:
An intrusive rock with a quartz component between 20 and 60%, feldspar is present as plagioclase with 10% or less alkali feldspar.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Two-mica granite
Enumerated_Domain_Value_Definition:
A granite containing both dark mica (biotite) and light mica (muscovite).
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Ultramafic rocks
Enumerated_Domain_Value_Definition: An igneous rock composed chiefly of mafic minerals.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value:
Undivided crystalline rocks (seafloor units may include a variety of metamorphosed rock)
Enumerated_Domain_Value_Definition:
Igneous rock, composition and grain size not specified. In seafloor units, includes metamorphic rocks.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Undivided gneissic rocks
Enumerated_Domain_Value_Definition:
Coarse-textured metamorphic rock, shown together rather than separately at this map scale.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Undivided granitic rocks
Enumerated_Domain_Value_Definition:
Various igneous rocks of granitic (defined elsewhere) composition, shown together rather than separately at this map scale.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Undivided volcanic rocks
Enumerated_Domain_Value_Definition:
Various types of volcanic rocks, shown together rather than separately at this map scale.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Volcanic gneiss
Enumerated_Domain_Value_Definition: Gneiss of volcanic origin.
Enumerated_Domain_Value_Definition_Source:
Modified from Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., eds., 2005, Glossary of geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: <Null>
Enumerated_Domain_Value_Definition: Null values indicate the unit is sedimentary.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute:
Attribute_Label: MIN_AGE
Attribute_Definition:
Minimum (youngest) geologic age of the rock unit. By convention, the term "Lower" refers to all rocks except intrusive igneous rocks which, owing to their method of emplacement, are referred to as being of age "Early".
Attribute_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Age unknown
Enumerated_Domain_Value_Definition: The age of the map unit is unknown.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Archean
Enumerated_Domain_Value_Definition:
The first eon of the Precambrian. It extended from about 3.8 billion to 2.5 billion years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Cambrian
Enumerated_Domain_Value_Definition:
The first period of the Paleozoic Era. It extended from about 543 to 490 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Cretaceous
Enumerated_Domain_Value_Definition:
The last period of the Mesozoic Era. It extended from about 144 to 65 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Devonian
Enumerated_Domain_Value_Definition:
A subdivision of the Paleozoic Era that extended from about 417 to 354 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Early Archean
Enumerated_Domain_Value_Definition:
The first major subdivision of the Archean Eon. It extended from about 3.8 to 3.4 billion years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Early Cretaceous
Enumerated_Domain_Value_Definition:
The first epoch of the Cretaceous Period. It extended from about 144 to 99 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Early Proterozoic
Enumerated_Domain_Value_Definition:
The first major subdivision of the Proterozoic Eon. It extended from about 2.5 to 1.6 billion years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Eocene
Enumerated_Domain_Value_Definition:
A subdivision of the Paleogene Period. It extended from about 54.8 to 33.7 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Jurassic
Enumerated_Domain_Value_Definition:
A subdivision of the Mesozoic Era. It extended from about 206 to 144 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Late Archean
Enumerated_Domain_Value_Definition:
The last major subdivision of the Archean Eon. It extended from about 3.0 billion to 2.5 billion years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Late Cretaceous
Enumerated_Domain_Value_Definition:
The last epoch of the Cretaceous Period. It extended from about 99 to 65 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Late Jurassic
Enumerated_Domain_Value_Definition:
The last epoch of the Jurassic Period. It extended from about 159 to 144 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Late Proterozoic
Enumerated_Domain_Value_Definition:
The last major subdivision of the Proterozoic Eon. It extended from about 900 million to 543 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Lower Cretaceous
Enumerated_Domain_Value_Definition:
The first epoch of the Cretaceous Period. It extended from about 144 to 99 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Lower Devonian
Enumerated_Domain_Value_Definition:
The first epoch of the Devonian Period. It extended from about 417 to 391 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Lower Eocene
Enumerated_Domain_Value_Definition:
The first major subdivision of the Eocene Epoch. It extended from about 54.8 to 49 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Lower Jurassic
Enumerated_Domain_Value_Definition:
The first major subdivision of the Jurassic Period. It extended from about 206 to 180 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Lower Mississippian
Enumerated_Domain_Value_Definition:
The first major subdivision of the Mississippian Period. It extended from about 354 to 342 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Lower Ordovician
Enumerated_Domain_Value_Definition:
The first major subdivision of the Ordovician Period. It extended from about 490 to 470 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Lower Pennsylvanian
Enumerated_Domain_Value_Definition:
The first major subdivision of the Pennsylvanian Period. It extended from about 323 to 311 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Lower Permian
Enumerated_Domain_Value_Definition:
The first major subdivision of the Permian Period. It extended from about 290 to 256 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Lower Silurian
Enumerated_Domain_Value_Definition:
The first major subdivision of the Silurian Period. It extended from about 443 to 423 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Mesozoic
Enumerated_Domain_Value_Definition: The era that extended from about 248 to 65 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Middle Archean
Enumerated_Domain_Value_Definition:
A subdivision of the Archean Eon. It extended from about 3.4 to 3 billion years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Mid-Cretaceous
Enumerated_Domain_Value_Definition:
A subdivision (informal) of the Cretaceous Period. It extends from 88 to 108 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Middle Devonian
Enumerated_Domain_Value_Definition:
A subdivision of the Devonian Period. It extended from about 391 to 370 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Middle Eocene
Enumerated_Domain_Value_Definition:
A subdivision of the Eocene Epoch. It extended from about 49 to 41.3 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Middle Jurassic
Enumerated_Domain_Value_Definition:
A subdivision of the Jurassic Period. It extended from about 180 to 159 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Middle Ordovician
Enumerated_Domain_Value_Definition:
A subdivision of the Ordovician Period. It extended from about 470 to 458 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Middle Proterozoic
Enumerated_Domain_Value_Definition:
A subdivision of the Proterozoic Eon. It extended from about 1600 to 900 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Miocene
Enumerated_Domain_Value_Definition:
The first epoch of the Neogene Period. It extended from about 23.8 to 5.3 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Mississippian
Enumerated_Domain_Value_Definition:
The period in the Paleozoic Era that extended from about 354 to 323 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Neogene
Enumerated_Domain_Value_Definition:
The last major subdivision of the Tertiary Period. It extended from about 24 to 1.8 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Oligocene
Enumerated_Domain_Value_Definition:
The last epoch of the Paleogene Period. It extended from about 33.7 to 23.8 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Ordovician
Enumerated_Domain_Value_Definition:
A subdivision of the Paleozoic Era. It extended from about 490 to 443 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Paleocene
Enumerated_Domain_Value_Definition:
The first epoch of the Paleogene Period. It extended from about 65 to 54.8 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Paleogene
Enumerated_Domain_Value_Definition:
The first major subdivision of the Tertiary Period. It extended from about 65 to 24 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Paleozoic
Enumerated_Domain_Value_Definition: The era that extended from about 543 to 248 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Pennsylvanian
Enumerated_Domain_Value_Definition:
The period in the Paleozoic Era that extended from about 323 to 290 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Permian
Enumerated_Domain_Value_Definition:
The last period in the Paleozoic Era. It extended from about 290 to 248 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Pleistocene
Enumerated_Domain_Value_Definition:
The first epoch of the Quaternary Period. It extended from about 1.8 to 0.01 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Pliocene
Enumerated_Domain_Value_Definition:
The last epoch of the Neogene Period. It extended from about 5.3 to 1.8 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Precambrian
Enumerated_Domain_Value_Definition:
The interval of geologic time prior to the beginning of the Paleozoic Era. It extended from the origin of the Earth to about 540 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Pre-Cenozoic
Enumerated_Domain_Value_Definition:
The interval of geologic time (informal) prior to the beginning of the Cenozoic Era. It extended from the origin of the Earth to about 65 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Pre-Cretaceous
Enumerated_Domain_Value_Definition:
The interval of geologic time (informal) prior to the beginning of the Cretaceous Period. It extended from the origin of the Earth to about 144 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Quaternary
Enumerated_Domain_Value_Definition:
The last period of the Cenozoic Era. It began about 1.8 million years ago and extends to the present.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Silurian
Enumerated_Domain_Value_Definition:
A subdivision of the Paleozoic Era. It extended from about 443 to 417 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Tertiary
Enumerated_Domain_Value_Definition:
The first period of the Cenozoic Era. It extended from about 65 to 1.8 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Triassic
Enumerated_Domain_Value_Definition:
The first period in the Mesozoic Era. It extended from about 248 to 206 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Upper Cambrian
Enumerated_Domain_Value_Definition:
The last epoch of the Cambrian Era. It extended from about 500 to 490 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Upper Cretaceous
Enumerated_Domain_Value_Definition:
The last epoch of the Cretaceous Period. It extended from about 99 to 65 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Upper Devonian
Enumerated_Domain_Value_Definition:
The last epoch of the Devonian Period. It extended from about 370 to 354 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Upper Eocene
Enumerated_Domain_Value_Definition:
The last major subdivision of the Eocene Epoch. It extended from about 37 to 33.7 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Upper Jurassic
Enumerated_Domain_Value_Definition:
The last epoch of the Jurassic Period. It extended from about 159 to 144 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Upper Mississippian
Enumerated_Domain_Value_Definition:
The last major subdivision of the Mississippian Period. It extended from about 327 to 323 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Upper Ordovician
Enumerated_Domain_Value_Definition:
The last epoch of the Ordovician Period. It extended from about 458 to 443 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Upper Pennsylvanian
Enumerated_Domain_Value_Definition:
The last major subdivision of the Pennsylvanian Period. It extended from about 296 to 290 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Upper Permian
Enumerated_Domain_Value_Definition:
The last epoch of the Permian Period. It extended from about 256 to 248 million years ago.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute:
Attribute_Label: MAX_AGE
Attribute_Definition: Maximum (oldest) geologic age of the rock unit.
Attribute_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Unrepresentable_Domain: See MIN_AGE attribute definitions.
Attribute:
Attribute_Label: MIN_MAX_RELATE
Attribute_Definition:
Relationship between the minimum and maximum ages of the rock unit.
Attribute_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: And
Enumerated_Domain_Value_Definition:
Map unit consists of one or more subunits whose rocks are of age MIN_AGE, and one or more subunits whose rocks are of age MAX_AGE.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Or
Enumerated_Domain_Value_Definition:
Map unit consists of one or more subunits whose rocks are of age MIN_AGE, or one or more subunits whose rocks are of age MAX_AGE.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Thru
Enumerated_Domain_Value_Definition:
Map unit consists of one or more subunits whose rocks age(s), separately and/or together, range from MIN_AGE to MAX_AGE.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: And/Or
Enumerated_Domain_Value_Definition:
Map unit consists of one or more subunits whose rocks are of age MIN_AGE, and one or more subunits whose rocks are of age MAX_AGE, and one or more subunits whose rocks range from MIN_AGE to MAX_AGE.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: <Null>
Enumerated_Domain_Value_Definition:
Indicates age does not span more than one stratigraphic unit of time.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute:
Attribute_Label: UNIT_UNCERTAINTY
Attribute_Definition:
Indicates if the geologic unit composition is uncertain or, in the case of marine rocks and sediments that were sampled by dredging, whether the material is in situ or may have been introduced to the area by ice-rafting.
Attribute_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Y
Enumerated_Domain_Value_Definition: Indicates unit composition is uncertain.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: <Null>
Enumerated_Domain_Value_Definition: Indicates the composition of the unit is relatively certain.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute:
Attribute_Label: AGE_UNCERTAINTY
Attribute_Definition:
Indicates uncertainty about the assigned age of the geologic unit.
Attribute_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Y
Enumerated_Domain_Value_Definition: Indicates assigned age is uncertain.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: <Null>
Enumerated_Domain_Value_Definition: Indicates the assigned age of the unit is relatively certain.
Enumerated_Domain_Value_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute:
Attribute_Label: MAP_UNIT_NOTE
Attribute_Definition: Notes associated with selected rock units.
Attribute_Definition_Source: Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E. (2005)
Attribute_Domain_Values:
Unrepresentable_Domain: Character string.
Attribute:
Attribute_Label: Shape_Length
Attribute_Definition: Length of feature in internal units.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 60
Range_Domain_Maximum: 57,401,694
Attribute_Units_of_Measure: Meters
Attribute:
Attribute_Label: Shape_Area
Attribute_Definition: Area of feature in internal units squared.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 126
Range_Domain_Maximum: 3,071,973,073,462
Attribute_Units_of_Measure: Square meters
Overview_Description:
Entity_and_Attribute_Overview:
Map units shown on the Geologic Map of North America are defined on the basis of age, origin, and where possible, composition. Phanerozoic rocks regionally metamorphosed to amphibolite facies or higher (or blueschist facies or higher in active orogenic belts) are distinguished by a diagonal line overprint layer, as are rocks metamorphosed to granulite facies in the Canadian shield. Other special lithologies and depositional environments such as melange, predominately continental deposits, and off-shelf (not offshore) marine deposits exposed on land are also indicated by overprint layers.
The unit labels used on the map are intended to provide the maximum amount of information for each map unit. This greatly simplifies the map explanation and minimizes the need to repeatedly refer to it. However, the system requires long and complex letter symbols. In order to interpret the symbols, it is necessary to be aware of the following:
1. Ages are indicated by uppercase letters and by lowercase letters and/or numbers preceding them. The lowercase letters and numbers indicate subdivisions of time-stratigraphic units. Most of these follow standard conventions, but because geologic special characters were substituted for standard characters, some are not obvious. Major subdivisions of time-stratigraphic units are generally indicated by l-lower, m-middle, and u-upper. In plutonic rocks the same subdivisions indicate Early, Middle, and Late. Further subdivisions are indicated by numbers, starting with the oldest = 1. In the Precambrian, superscripts are used for subdivisions, for example Y¹, Y², Y³. Combined units or units of uncertain age are indicated by double age designations, with the oldest age first. Where only an age designation appears in the unit label, the unit is sedimentary. In a few areas in the Canadian Shield and in the upper Midwest, the symbols Xcs and Xqz are used to identify units of Early Proterozoic sandstone and conglomerate, and quartzite, respectively.
2. For volcanic rocks, the age designation is followed by a lowercase "v" (e.g., plTv-Pliocene volcanic rocks). Lowercase letters following the "v" indicate lithology: f-felsic; i-intermediate; m-mafic; sv-mixed sedimentary and volcanic; b--bimodal; k-alkalic (e.g., plTvmk-Pliocene alkaline mafic volcanics).
3. For plutonic rocks, lowercase letters following the age designation indicate lithology: q-quartz monzonite and granite; g-undivided granitoid; f-felsite; i-granodiorite and quartz diorite; m-diorite and gabbro; y-syenite and monzodiorite; my-alkaline gabbro and syenite; a-anorthosite; and u-ultramafic.
4. For high-grade metamorphic rocks, age of the protolith is given. Lowercase letters following the age designation indicate lithology of the protolith: n-gneiss; sn-sedimentary gneiss; gn-granitic gneiss; and sgn- paragneiss and orthogneiss. Undivided crystalline rocks are indicated by x.
5. Lower-case letters without age designations indicate lithology of units of unknown or unspecified age: u- ultramafic rocks; x-crystalline rocks; g-granitoid rocks.
6. Seafloor units are indicated by single asterisks (*) following the unit abbreviation. Special seafloor units are indicated by two asterisks (**) following the unit abbreviation. Description of special seafloor units can be found in the "MAP_UNIT_NOTE" attribution field of the feature class.
7. Units with a query (?) before the unit abbreviation indicate uncertainty about age. Units with a query (?) after the unit abbreviation indicate uncertainty about composition, or whether the rock is in situ. Unit uncertainty information can also be queried via the "UNIT_UNCERTAINTY" and "AGE_UNCERTAINTY" attribution field(s) of the feature class.
Age designations for map units are as follows:
CZ - Cenozoic
Q - Quaternary
pQ - Pleistocene
T - Tertiary
plT - Pliocene
nT - Neogene
mT - Miocene
pgT - Paleogene
oT - Oligocene
eT - Eocene
paT - Paleocene
MZ - Mesozoic
K - Cretaceous
J - Jurassic
TR - Triassic
PZ - Paleozoic
P - Permian
PA - Pennsylvanian
M - Mississippian
D - Devonian
S - Silurian
O - Ordovician
CA - Cambrian
pCA - Precambrian
Z - Late Proterozoic (570-900 Ma)
Y - Middle Proterozoic (900-1600 Ma)
Y¹ - Middle Proterozoic (1400-1600 Ma)
Y² - Middle Proterozoic (1200-1400 Ma)
Y³ - Middle Proterozoic (900-1200 Ma)
X - Early Proterozoic (1600-2500 Ma)
X¹ - Early Proterozoic (2100-2500 Ma)
X² - Early Proterozoic (1800-2100 Ma)
X³ - Early Proterozoic (1600-1800 Ma)
A - Archean
W - Late Archean
Entity_and_Attribute_Detail_Citation:
Reed, J.C. Jr., Wheeler, J.O., and Tucholke, B.E., 2005, Geologic Map of North America - Perspectives and explanation: Boulder, Colorado, Geological Society of America, Decade of North American Geology, 28 p.
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: USGS Information Services
Contact_Address:
Address_Type: mailing and physical address
Address: Box 25286
City: Denver
State_or_Province: CO
Postal_Code: 80225
Country: USA
Contact_Voice_Telephone: 1-888-ASK-USGS
Contact_TDD/TTY_Telephone: 1-888-ASK-USGS
Contact_Facsimile_Telephone: 303-202-4693
Contact_Electronic_Mail_Address: <http://store.usgs.gov/>
Resource_Description: U.S. Geological Survey Data Series, Report Number 424, 2009
Distribution_Liability:
This digital publication was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data published in this Data Series have been used by the USGS, no warranty, expressed or implied, is made by the U.S. Geological Survey as to the accuracy of the data and related materials and/or the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of this data, software, or related materials. Graphical map depictions are intended to be used within the map scale limits applicable to the source data. Although software enables the user to view data at various scales, the user is cautioned to refer to the source documentation for the appropriate map scale limitations.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: GDB
Format_Version_Number: 9.1
Format_Specification: ESRI File Geodatabase
Format_Information_Content: Polygon, line, and point feature classes
File_Decompression_Technique: File Geodatabase compression (uncompress with ArCatalog)
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <https://pubs.usgs.gov/ds/424>
Online_Computer_and_Operating_System: Windows XP
Fees: None
Ordering_Instructions: <https://pubs.usgs.gov/ds/424>
Turnaround: N/A
Custom_Order_Process:
For those who wish to order this publication on Compact Disc, call 1-888-ASK-USGS (1-888-275-8747), visit <http://ask.usgs.gov>, contact any USGS Earth Science Information Center (ESIC), or write:
USGS Information Services Box 25286 Denver, CO 80225
Technical_Prerequisites:
ArcGIS Desktop 9.X is required to open the map document (GMNA_South.mxd).
Metadata_Reference_Information:
Metadata_Date: 20090424
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Christopher Garrity
Contact_Organization: U.S. Geological Survey
Contact_Position: Cartographer
Contact_Address:
Address_Type: mailing address
Address: 12201 Sunrise Valley Drive
Address: Mail Stop 956
City: Reston
State_or_Province: VA
Postal_Code: 20192
Country: USA
Contact_Voice_Telephone: 703-648-6426
Contact_TDD/TTY_Telephone: 703-648-6426
Contact_Facsimile_Telephone: 703-648-6419
Contact_Electronic_Mail_Address: cgarrity@usgs.gov
Hours_of_Service: 9:00 AM - 6:00 PM
Contact_Instructions: Electronic mail is preferred method of contact
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Security_Information:
Metadata_Security_Classification_System: None
Metadata_Security_Classification: Unclassified
Metadata_Security_Handling_Description: None
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile
Generated by mp version 2.9.6 on Fri Apr 24 10:22:42 2009