Jurassic-age Arapien Shale in the White Hills, Sevier County.
https://geology.utah.gov/wp-content/uploads/ugs-logo-large.png00Utah Geological Surveyhttps://geology.utah.gov/wp-content/uploads/ugs-logo-large.pngUtah Geological Survey2014-04-21 12:21:202016-08-10 16:39:49POTD April 21, 2014: White Hills, Sevier County, Utah