Pleistocene basalts from nearby Merriam Crater (?) cap reddish sandstone of the Middle Triassic Moenkopi Formation in a buttress unconformity that represents roughly 240 million years of missing geologic time. This image was captured from Ron Schott's gigapan image of Grand Falls on the Little Colorado River near Leupp, Arizona (http://gigapan.com/gigapans/192586 ; 15 Oct. 2015)
Photographer: Ron Schott
Photo Date: October 2015
Photo Location Accuracy: Approximately Located
Photo Tags: Grand Falls, San Francisco volcanic field, Pleistocene, Triassic, basalt, Moenkopi Formation