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Scientific Investigations Map 2777

Prepared in cooperation with the South Dakota School of Mines and Technology Foundation

Maps Showing Geology, Structure, and Geophysics of the Central Black Hills, South Dakota

By Jack A. Redden1 and Ed DeWitt2

1 South Dakota School of Mines and Technology
2 U.S. Geological Survey


Thumbnail of publication and link to PDF (10.8 MB)

This 1:100,000-scale digital geologic map details the complex Early Proterozoic granitic rocks, Early Proterozoic supracrustal metamorphic rocks, and Archean crystalline basement of the Black Hills. The granitic rocks host pegmatite deposits renowned for their feldspar, mica, spodumene, and beryl. The supracrustal rocks host the Homestake gold mine, which produced more than 40 million ounces of gold over a 125-year lifetime. The map documents the Laramide deformation of Paleozoic and Mesozoic cover rocks; and shows the distribution of Laramide plutonic rocks associated with precious-metals deposits. Four 1:300,000-scale maps summarize Laramide structures; Early Proterozoic structures; aeromagnetic anomalies; and gravity anomalies. Three 1:500,000-scale maps show geophysical interpretations of buried Early Proterozoic to Archean rocks in western South Dakota and eastern Wyoming.

First posted January 6, 2009

For additional information contact:

Team Chief Scientist,
USGS Central Mineral Resources Team
Box 25046
Denver Federal Center
MS 973
Denver, CO 80225-0046

Part or all of this report is presented in Portable Document Format (PDF); the latest version of Adobe Reader or similar software is required to view it. Download the latest version of Adobe Reader, free of charge.

Suggested citation:

Redden, J.A., and DeWitt, Ed, 2008, Maps showing geology, structure, and geophysics of the central Black Hills, South Dakota: U.S. Geological Survey Scientific Investigations Map 2777, 44-p. pamphlet, 2 sheets.



Precambrian Rock Units

Phanerozoic Rock Units

Proterozoic Plutonism and Metamorphism

Precambrian Structure

Phanerozoic Structure



Mineral Deposits

Ground Water


References Cited

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