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• Organization: Department of the Interior
• Updated: 20230911 | Harvested: July 16, 2025 at 08:49 AM

The Blue Ridge belt in northwestern North Carolina and northeastern Tennessee is composed chiefly of 1,000-million to 1,100-million-year-old metamorphic and plutonic rocks that have been thrust...

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• Organization: Department of the Interior
• Updated: 20230328 | Harvested: July 16, 2025 at 09:06 AM

The geodatabase for the Charlotte 1 degree × 2 degrees quadrangle by Goldsmith and others (1988) was compiled in the Geologic Map Schema (GeMS). The geologic map extends across four lithotectonic...

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• Organization: Department of the Interior
• Updated: 20220829 | Harvested: July 18, 2025 at 05:06 AM

This 1:50,000-scale geologic map represents a compilation of the most recent geologic studies of the upper Arkansas River valley, between Leadville and Salida, Colorado. The valley is structurally...

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• Organization: Department of the Interior
• Updated: 20200929 | Harvested: July 18, 2025 at 04:05 AM

In 1968, the Missouri Geological Survey (MGS) established the Operation Basement program to address three objectives: a) to obtain drill hole and underground mining data relative to the structure...

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