Skip to main content
U.S. flag

An official website of the United States government

Return to search results

USGS S. Warren Hobbs Coeur d'Alene Map Collection

Published by U.S. Geological Survey | Department of the Interior | Catalog Last Checked: August 01, 2026 at 03:14 AM | Dataset Last Updated: November 17, 2023 at 12:00 AM
History: This collection of geologic, mine, and related maps was compiled and used by S. Warren Hobbs for his research on the Coeur d'alene Mining District, Idaho - Professional Paper 478 (1965). The Coeur d'Alene Study: General geology of the Coeur d'Alene district, one of the larger lead-, zinc-, and silver-producing areas of the world, is presented. The geology was remapped at a scale of 1:24,000 and compiled on five maps from west to east as follows: Smelterville, Kellogg, Wallace, Mullan, and Pottsville. Bedrock, primarily the Precambrian Belt Series which forms the host rock for the ore, is a thick conformable geosynclinal group of fine-grained clastics. Igneous rocks are principally two groups of small monzonitic intrusives and other dikes. Structurally the district is located at the intersection of a major anticlinal arch in the geosynclinal sediments with a major zone of weakness, the Lewis and Clark line; faults are the dominant structural feature. Mineral deposits formed near satellite intrusions of larger igneous bodies intruded during the Mesozoic within a structural knot of highly fractured rocks.

Resources

2 resources available

Find Related Datasets

data.gov

An official website of the GSA's Technology Transformation Services

Looking for U.S. government information and services?
Visit USA.gov