Geology of the unconformity on Mount Everts in Yellowstone National Park
By Yellowstone Volcano Observatory
January 2023 (approx.)
Detailed Description
Geology of the unconformity on Mount Everts in Yellowstone National Park. Sketch at the top was made by geologist William Henry Holmes in 1878 and correctly identifies Cretaceous sediments overlain by much younger rhyolite rocks, including fine ash deposits (“tufa”). The photo at the bottom shows the same outcrop as viewed from Mammoth Hot Springs (USGS photo by Mike Poland, October 10, 2021).
Sources/Usage
Public Domain.