Keystone thrust

Red Rock Canyon Recreation Area, southern Nevada. The upper part of Red Rock Wash follows the swale in the upper center of the photo. It marks the trace of the Keystone Thrust, where gray Paleozoic limestones have been shoved over the light-colored Aztec Sandstone to the east. The thrust also continues to the south, parallel to and near the road I'm on. The thrust is parallel to the Red Rock escarpment, which is off the photo to the left (east), on the other side of the sandstone outcrops
The road I'm on, the Rocky Gap road, is a barely passable Jeep track, still open to motorized traffic, that goes through Willow Spring gap in the Red Rock escarpment along Red Rock Wash, and then south behind the escarpment up a steep canyon. It eventually exits into Lovell Canyon road and the Pahrump highway. However, structures like stonework around culverts indicate this road was once in much better shape, and it may have been a CCC (Civilian Conservation Corps) project from the 1930s.