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This is a Non-Federal dataset covered by different Terms of Use than

Loudoun Geologic Bedrocks

Metadata Updated: February 9, 2024

More Metadata"Bedrock" is one of four layers which collectively describe the subsurface geologic formation, structural geology and surficial deposits. "Bedrock" is the subsurface expression of the geologic formations near the ground surface as mapped by outcrops and well borings. The geology of Loudoun County, Virginia, was mapped in 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 This geologic map was compiled in 1993 from a series of detailed published and unpublished field investigations at scales of 1:12,000 and 1:24,000.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). The data was later revised and published by USGS in the Open File Report, MAP OF-99-150, GEOLOGIC MAP OF LOUDOUN COUNTY, VIRGINIA By Scott Southworth, W.C. Burton, J.S. Schindler, and A.J. Froelich1 with contributions on the geology of the Piedmont province by A.A. Drake, Jr., and R.E. Weems and an aeromagnetic survey by D.L. Daniels, W.F. Hanna, and R.E. Bracken.

Access & Use Information

Public: This dataset is intended for public access and use. Non-Federal: This dataset is covered by different Terms of Use than License: See this page for license information.

Downloads & Resources


Metadata Created Date September 2, 2022
Metadata Updated Date February 9, 2024

Metadata Source

Harvested from Loudoun County Virginia Data Source

Additional Metadata

Resource Type Dataset
Metadata Created Date September 2, 2022
Metadata Updated Date February 9, 2024
Publisher Loudoun GIS
Data First Published 2017-09-11T14:04:33.000Z
Data Last Modified 2023-09-13T03:21:22.323Z
Category geospatial
Public Access Level public
Metadata Context
Schema Version
Catalog Describedby
Harvest Object Id 6b0668fa-5ae8-4322-8051-9a369c9c1ba4
Harvest Source Id bc39e510-cff7-4263-8d5b-7c800dd08cd6
Harvest Source Title Loudoun County Virginia Data Source
Homepage URL
Metadata Type geospatial
Old Spatial -77.9634,38.8489,-77.3240,39.3216
Source Datajson Identifier True
Source Hash 7bdcf71e73c0e0e5dc0a95d66c398394939dab21bf2956cdd5048181f27b3ff3
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -77.9634, 38.8489, -77.9634, 39.3216, -77.3240, 39.3216, -77.3240, 38.8489, -77.9634, 38.8489}

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