United States, Arizona, Mohave, Grand Canyon National Park vicinity: Black Rock area, ca. 4 km south of I-15 Black Rock Interchange, Upper Mojave Desert
36.95 -113.633333
36° 57' N, 113° 38' W
950 meters
950m
Gypsiferous shale, Moekopi Formation. Highly developed cryptogamic soil crust. Dominated by Coleogyne ramosissima, Larrea tridentata.