Generalized geologic map of the Eocene Absaroka volcanic field
By Yellowstone Volcano Observatory
1972 (approx.)
Detailed Description
Generalized geologic map of the Eocene Absaroka volcanic field (modified from Smedes and Prostka, 1972 and “Geology of Wyoming”). Black masses represent locations of volcanic centers (see Chadwick, 1970). Single dot-dashed line is the boundary of Yellowstone National Park.
Sources/Usage
Public Domain.