This online guide to the Organ Pipe Cactus National Monument is free to download from the AZGS Document Repository http://repository.azgs.az.gov/uri_gin/azgs/dlio/1685 The 66-page illustrated guide includes a section on the Pinacate volcanic field along the Arizona-Mexico border.
Photographer: John Bezy
Photo Date: 2000
Photo Location Accuracy: Approximately Located
Photo Tags: Organ Pipe Cactus National Monument, Pinacate volcanic field, geotourism, Down-to-Earth, volcanism, Holocene, Pleistocene, Quaternary, Tertiary, Basin and Range Province 
