The Permian Supai Formation in the Holbrook Basin includes a thick sequence of salt and some potash. The roof of the potash deposit is situated ~700 to 2,000 feet below the ground surface; most of the deposit is found at about 1200 to 1300 ft deep. Maximum thickness of the potash is about 40 feet. Total volume estimates range from 5.68 to 6.45 cubic kilometers.
A substantial portion of the Supai potash lies below Petrified Forest National Park.
Photographer: Steve Rauzi
Photo Date: June 2010
Photo Location Accuracy: Location Unknown
Photo Tags: potash, Supai Formation, Holbrook Basin, Permian, Petrified Forest National Park 
