Friday Field Foto #36: Thrust fault contact
This is near the Valley of Fire region in southernmost Nevada.
The gray rocks are Paleozoic carbonates, the vibrant orangish rocks are Jurassic eolian rocks. Older on top of younger — yay for thrust faults! If I remember, I think this is called the Keystone Thrust.
Note the person on the hillslope just below the gray cliff for scale.