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#1 Federal
Database for the geologic map of the Frederick 30 x 60 quadrangle, Maryland, Virginia, and West Virginia
- Organization: Department of the Interior
- Dataset Last Updated: April 30, 2025 at 12:00 AM
The database for the geologic map of the Frederick 30 x 60 quadrangle covers the distinct geologic provinces and sections of the central Appalachian region that are defined by unique bedrock and...
- xml
- xml
Search relevance: 1.00 | Views last month: 5 | Catalog Last Checked: August 01, 2026 at 05:46 AM
#2 Federal
Database for the geologic map of the Washington West 30' x 60' quadrangle, Maryland, Virginia, and Washington D.C.
- Organization: Department of the Interior
- Dataset Last Updated: February 25, 2025 at 12:00 AM
The database for the Washington West 30- by 60-minute quadrangle covers an area of approximately 4,884 square kilometers (1,343 square miles) in and west of the Washington, D.C., metropolitan...
- xml
- xml
Search relevance: 1.00 | Views last month: 2 | Catalog Last Checked: August 01, 2026 at 04:03 AM

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