Photos of the Pinnacles National Park (California), taken in April 2017 during 2 days of hiking on the most scenic trails of the park.
The dramatic landscape with red cliffs, pinnacles and caves is formed by breccias rocks, which are the geologic remnants of an extinct volcano located near the San Andreas fault.
Several "talus caves" can be found in the park. Deep, narrow gorges and shear fractures were transformed into caves by large chunks of rock falling from above and wedging into the cracks leaving an open area below.
For more info about this place, read en.wikipedia.org/wiki/Pinnacles_National_Park and www.nps.gov/pinn/index.htm .