The yellow arrow points to the contact between the Cambrian Sandstone and underlying Precambrian metamorphic rock. This area is called the Great Unconformity of Powell, named after it’s first observer John Wesley Powell in 1869. (Image ID# sru-14e)
https://geologypics.com/wp-content/uploads/2017/04/geologic-time-pics-logo-300x115.png00Marli Millerhttps://geologypics.com/wp-content/uploads/2017/04/geologic-time-pics-logo-300x115.pngMarli Miller2012-04-02 22:23:012017-09-24 18:41:55Great Unconformity in Wyoming