Landscape of Eastern Utah
July 09, 2007
The photo above showing the sharply eroded sandstone cliffs of the San Rafael Swell was taken at a location on Interstate 70 in eastern Utah, not far from the Colorado border. These cliffs are part of the Shinarump and Kaibab sandstone formations, which were created when the "Western Interior Seaway" covered this part of Utah. This huge inland sea split the continent of North America into two halves and covered much of what is now Utah during most of the early and mid-Cretaceous Period, about 145-65 million years ago. See also the Earth Science Picture of the Day for September 16, 2006. Photo taken in June of 1999.