Skip to main content
U.S. flag

An official website of the United States government

Heise cliffs, the type location for the 4.45–7.0 million year old Heise Volcanic Field

By Yellowstone Volcano Observatory May 2005 (approx.)
Heise cliffs, the type location for the 4.45–7.0 million year old Heise Volcanic Field
Original Thumbnail Medium

Detailed Description

Heise cliffs, the type location for the 4.45–7.0 million year old Heise Group from the Heise volcanic field, which preceded the Yellowstone Plateau volcanic field.  Most of the cliffs exposed here are rhyolitic, densely welded, rhyolitic pyroclastic density flow deposits.  USGS Photo by L. A. Morgan (May 2005).

Sources/Usage

Public Domain.