The rugged Bonito lava flow in the foreground was erupted from Sunset Crater in two stages. The flow originated from vents at the west to NW base of Sunset Crater, which is out of view to the right. The peak beyond the flow to the north is O'Leary Peak, which consists of two rhyodacitic lava domes of Pleistocene age. O'Leary Peak is the NE-most silicic center in the San Francisco Mountain volcanic field.

Photo by Richard Moore, 1975 (U.S. Geological Survey).

This image is made available as a Public Domain Work, but proper attribution is appreciated.

San Francisco Volcanic Field