Identification_Information: Citation: Citation_Information: Originator: Paul K. Sims Originator: Richard W. Saltus Originator: Eric D. Anderson Publication_Date: 2008 Title: Precambrian basement structure map of the continental United States-an interpretation of geologic and aeromagnetic data Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: Scientific Investigation Map Issue_Identification: SIM 3012 Publication_Information: Publication_Place: Denver Federal Center Publisher: US Geological Survey Online_Linkage: http://pubs.usgs.gov/sim/3012/ Description: Abstract: This report presents a map of principal basement structures formed during the Precambrian in continental United States based largely on interpretation of regional aeromagnetic anomaly data of North America, published in 2002. Purpose: The objective of the report is to provide a map of the basement tectonic framework, useful for interpretation of Phanerozoic tectonic evolution and mineral resources. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2008 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -127.689041 East_Bounding_Coordinate: -68.664079 North_Bounding_Coordinate: 50.797703 South_Bounding_Coordinate: 26.208078 Keywords: Theme: Theme_Keyword_Thesaurus: American Geological Institute Glossary of Geology Theme_Keyword: aeromagnetic data Theme_Keyword: ductile shear zones Theme_Keyword: Precambrian Place: Place_Keyword_Thesaurus: U.S. Board of Geographic Names (BGN) Geographic Place_Keyword: United States Access_Constraints: None Use_Constraints: None Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Eric Anderson Contact_Organization: US Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing address Address: Denver Federal Center Address: PO Box 25046, MS 964 City: Denver State_or_Province: Colorado Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 303-236-5652 Contact_Facsimile_Telephone: 303-236-1425 Contact_Electronic_Mail_Address: ericanderson@usgs.gov Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.2.1350 Data_Quality_Information: Logical_Consistency_Report: Geologic structures were digitized from a 1:50,000,000 hardcopy map. Completeness_Report: Map data in this report should not be used at scales greater than 1:50,000,000. Attribute_Accuracy: Attribute_Accuracy_Report: These data were mapped at a scale of 1:10,000,000. Quantitative_Attribute_Accuracy_Assessment: Attribute_Accuracy_Value: high angle Attribute_Accuracy_Explanation: High-angle fault - chiefly transcurrent shears and faults of late Paleoproterozoic -Mesoproterozoic age,but includes faults of late Archean age in northern Midcontinent. Arrows indicate relative horizontal displacement where based chiefly on magnetic data. Note: same distinction applies to structures following Quantitative_Attribute_Accuracy_Assessment: Attribute_Accuracy_Value: thrust Attribute_Accuracy_Explanation: Thrust fault of Paleoproterozoic age associated with suture zones. Solid line, based chiefly on geologic data; dashed line based chiefly on magnetic data. Quantitative_Attribute_Accuracy_Assessment: Attribute_Accuracy_Value: solid Attribute_Accuracy_Explanation: Based chiefly on geologic data Quantitative_Attribute_Accuracy_Assessment: Attribute_Accuracy_Value: dashed Attribute_Accuracy_Explanation: Based chiefly on magnetic data Quantitative_Attribute_Accuracy_Assessment: Attribute_Accuracy_Value: duct Attribute_Accuracy_Explanation: Ductile shear zone, mainly of late Paleoproterozoic age Quantitative_Attribute_Accuracy_Assessment: Attribute_Accuracy_Value: rift Attribute_Accuracy_Explanation: Boundary of major rift zone of late Mesoproterozoic (midcontinent rift) and Cambrian (Reelfootrift) age Quantitative_Attribute_Accuracy_Assessment: Attribute_Accuracy_Value: open Attribute_Accuracy_Explanation: Thrust fault of Mesoproterozoic (~1.1 Ga) age Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Paul K. Sims Originator: Richard W. Saltus Originator: Eric D. Anderson Publication_Date: 2007 Title: Precambrian basement structure map of the continental United States- an interpretation of geologic and aeromagnetic data Source_Scale_Denominator: 50,000,000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: unknown Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Sims et al., 2004 Source_Contribution: GIS database Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 709 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: 1.000000 Ordinate_Resolution: 1.000000 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: 0.0174 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: us_structures Entity_Type_Definition: Geologic structures Entity_Type_Definition_Source: Aeromagnetic data Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that areautomatically 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: Id Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: Type Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: high angle; thrust Enumerated_Domain_Value_Definition: High angle fault - chiefly transcurrent shears and faults of late Paleoproterozoic age, but includes faults of late Archean age in northern Midcontinent and northern Rocky Mountains. thrust - Thrust fault of Mesoproterozoic or Paleoproterozoic age. Enumerated_Domain_Value_Definition_Source: Interpretation Attribute: Attribute_Label: TypeII Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: dash; duct; open; rift; solid Enumerated_Domain_Value_Definition: Line structure in 'Type' attribute based chiefly on magnetic data. duct - Ductile shear zone; open - Thrust fault referred to in 'Type' attribute is of Mesoproterozoic age; rift - Boundary of major riftzone; solid - Line structure in 'Type' attribute based chiefly on geologic data. Enumerated_Domain_Value_Definition_Source: Interpretation Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: US Geological Survey Contact_Address: Address_Type: mailing address Address: Publishing Service Center 15 Address: MS 902 Box 25046 Address: Denver Federal Center City: Denver State_or_Province: Colorado Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 1-888-ASK-USGS Resource_Description: Downloadable Data Distribution_Liability: This database, identified as SIM-3012, has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use. Metadata_Reference_Information: Metadata_Date: 20070831 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Eric Anderson Contact_Organization: US Geologica Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing address Address: Denver Federal Center Address: PO Box 25046, MS 964 City: Denver State_or_Province: Colorado Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 303-236-5652 Contact_Facsimile_Telephone: 303-236-1425 Contact_Electronic_Mail_Address: ericanderson@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile