Wider shot showing the gray Cambrian Bonanza King limestome, left background, thrust over the Jurassic Aztec sandstone. This major thrust is one of a number of related Mesozoic compressional faults, including the Keystone thrust, that formed as subduction on the western margin of ancient North America was building the Sierra Nevada batholith.
All images copyright © 2006 F.W. Vollmer and may not be used without permission.