A schematic cross section of the Pleistocene-Holocene San Pedro River channel, southeastern Arizona. From Pearthree, P.A. and Cook, J.P., Geology and Geomorphology of the San Pedro River, Southeastern Arizona. Arizona Geological Survey Special Paper 10, 24 p.
http://repository.azgs.az.gov/uri_gin/azgs/dlio/1633
Photographer: Phil Pearthree
Photo Date: 2015
