Metadata: IDENTIFICATION_INFORMATION: Citation: Citation_Information: Originator: U.S. Geological Survey, Eastern Earth Surface Processes Team Publication_Date: 19990000 Title: DIGITAL GEOLOGIC MAP OF LOUDOUN COUNTY VIRGINIA Description: Abstract: The geology of Loudoun County, Virginia, was mapped from 1988 through 1991 under a cooperative agreement between the U.S. Geological Survey (USGS) and the Loudoun County Department of Environmental Resources. This geologic map was compiled in 1993 from a series of detailed published and unpublished field investigations at scales of 1:12,000 and 1:24,000. Some of these same data were compiled as a digital geologic map at 1:100,000 scale (Burton and others, 1992a) and were the basis for a cost-benefit analysis of the societal value of geologic maps (Bernknopf and others, 1993). Purpose: Geology was researched and compiled for use in studies of soils and groundwater, and to support the County's comprehensive plan. Supplemental_Information: Data are stored in four ArcInfo coverages. Bedrock, surficial, faults and structural data are each stored in a separate coverage. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19880000 Ending_Date: 19930000 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None Planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -77.9679 East_Bounding_Coordinate: -77.3223 North_Bounding_Coordinate: 39.3328 South_Bounding_Coordinate: 38.8441 Keywords: Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: Virginia Theme_Keyword: Loudoun Theme_Keyword: geology Theme_Keyword: geologic Theme_Keyword: bedrock Theme_Keyword: surficial Theme_Keyword: fault Theme_Keyword: structure Access_Constraints: none Use_Constraints: Although all data and software released on this CD-ROM have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and (or) the functioning of the software. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. METADATA_REFERENCE_INFORMATION: Metadata_Date:19990507 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: USGS Eastern Earth Surface Processes Team Contact_Position: Pete Chirico Contact_Address: Address_Type: mailing and physical address Address: 926A National Center, 12201 Sunrise Valley Drive City: Reston State_or_Province: Virginia Postal_Code: 20192 Country: U.S.A. Contact_Voice_Telephone: (703) Contact_Facsimile_Telephone: (703) Contact_Electronic_Mail_Address: pchirico@usgs.gov Hours_of_Service: Monday - Friday 9:00 - 5:00 EST Metadata_Standard_Name: FGDC contact standards for digital geospatial metadata Metadata_Standard_Version: 19940608 DATA_QUALITY_INFORMATION: Logical_Consistency_Report: Polygon and chain-node topology present. Completeness_Report: Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 19930000 Title: none Source_Scale_Denominator: 12000 to 24000 Type_of_Source_Media: mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 19930000 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: none Source_Contribution: These geologic data were compiled from a series of detailed published and unpublished field investigations at scales from 1:12000 to 1:24000. Process_Step: Process_Description: Process_Date: 19990507 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: Please refer to the loudoun.txt or loudoun.htm report for explanation of geologic map units. An additional file fault_lookup.txt is included to explain the fault line coverage. An explanation of the ArcView or ArcInfo database is included in the file Explantion of Database (Geol_db.txt). Entity_and_Attribute_Detail_Citation: See above note. DISTRIBUTION_INFORMATION: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U. S. Geological Survey, Eastern Earth Surface Processes Team Contact_Address: Address_Type: mailing and physical address Address: 12201 Sunrise Valley Drive, National Center, MS 926A City: Reston State_or_Province: Virginia Postal_Code: 20192 Country: U.S.A. Contact_Voice_Telephone: (703) 648 - 6950 Contact_Facsimile_Telephone: (703) 648 - 6953 Contact_Electronic_Mail_Address: Hours_of_Service: Monday-Friday 8:00-5:00 EST Distribution_Liability: This data were 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 assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product or process disclosed in this report, and represents that its use would not infringe privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of this data or related materials. Reference therein to any specific commercial product, process, or related 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. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ARC/INFO EXPORT (.e00) Digital_Transfer_Option: Offline_Option: Offline_Media: CD-ROM Recording_Format: cd-writer