More from our visit to Crouse Canyon in the eastern #UintaMountains of #DaggettCounty #Utah. FYI the red sandstone formation you see throughout is the Uinta Mountain Formation, which has been called "the sandstone that fooled the great geologists".

Powell, Hayden, Emmons, and King all thought the rock was mid-Paleozoic but in fact it is *Pre-Cambrian*.

TLDR: They thought it was about 400 million years old but in fact it is 650 million - 2.5 billion years old. So they were off by a bit.

The Crouse Canyon formation here is about 800 million years old.

What is unusual for rock this old is that is it is mainly plain old sedimentary sandstone. Strange for rock buried 15-20,000 feet deep for several hundred million years. Some deeper/old layers are partially or completely metamorphosed, but these upper layers are not.

https://plantsandrocks.blogspot.com/2015/01/the-sandstone-that-fooled-great.html

#GreenRiver #BrownsPark #OutlawTrail #geology #precambrian #sandstone #metamorphic