Skip to main content
U.S. flag

An official website of the United States government

Sheepeater Cliff, in Yellowstone National Park

By Yellowstone Volcano Observatory 2003 (approx.)
Sheepeater Cliff, in Yellowstone National Park
Original Thumbnail Medium

Detailed Description

Slow cooling of a basaltic lava flow that was erupted about 500,000 years ago resulted in the formation of hexagonal columns at Sheepeater Cliff, in Yellowstone National Park.

Sources/Usage

Public Domain.