A geologic disconformity represents a period of non-deposition or erosion between two parallel layers of sedimentary rocks. Near Petrified Forest National Park in northern Arizona, the Mio-Pliocene age Bidahochi Formation lies disconformably on the Upper Triassic Chinle Formation.
Photographer: Unknown
Photo Location Accuracy: Approximately Located
Photo Tags: Mio-Pliocene, disconformity, Bidahochi Formation, Chinle Formation, Triassic, Petrified Forest National Park 
