History of Geologic Mapping at the USGS
American scientist-explorers have been making geologic maps since before the Bureau's inception in 1879.
U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Members of the Survey, made while in camp at Red Buttes at the junction of the North Platte and Sweetwater Rivers, Wyoming, 1870.
Geologic Mapping Hall of Fame
Information about some famous USGS geologic mappers and their contributions.
A Brief History of Geologic Mapping at the USGS
An overview of geologic mapping from 1879 to the present.