Maps showing geology, structure, and geophysics of the central Black Hills, South Dakota

Scientific Investigations Map 2777
Prepared in cooperation with the South Dakota School of Mines and Technology Foundation
By:  and 



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.

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title Maps showing geology, structure, and geophysics of the central Black Hills, South Dakota
Series title Scientific Investigations Map
Series number 2777
ISBN 9781411322141
DOI 10.3133/sim2777
Edition Version 1.0
Year Published 2008
Language English
Publisher U.S. Geological Survey
Contributing office(s) Central Mineral Resources Team
Description Report: iv, 44 p.; 2 Map Sheets - Sheet 1: 44 x 61.5 inches, Sheet 2: 43 x 57 inches; Downloads Directory
Country United States
State South Dakota
Other Geospatial Black Hills
Projection Universal Transverse Mercator
Scale 0
Online Only (Y/N) N
Additional Online Files (Y/N) Y
Google Analytic Metrics Metrics page
Additional publication details