Forms vertical cliffs along Colorado River, Cache Valley, Salt Wash, and Courthouse Wash. 0-350 Fort Wingate, N. Mex. 200 Chinle Formation Irregularly bedded buff to red sandstone, red mudstone, limestone, and conglomerate. Lenticular sandstone and conglomerate (Moss Back Member) locally at base. Freshwater shells, petrified wood, reptile bones. Forms slopes. 0-700 Chinle Valley, Ariz. Moss Back Ridge, Utah Unconformity Middle(?) and Early Triassic Moenkopi Formation Thin-bedded brown shale, gray and brown sandstone, arkosic grit, and conglomerate. Crops out on southwest side of Moab Valley and in several places in Salt and Cache Valleys. Forms slopes. 0-1,300 Moenkopi Wash, Ariz. Unconformity 250 Permian Cutler Formation Chocolate brown and red sandy shale, maroon and pinkish-gray arkose and conglomerate. Lower part probably equivalent in age to Rico Formation in areas to south and east. Crops out in Moab Canyon west of Moab fault. Forms slopes. 0-2,500 Cutler Creek, Colo. Pennsylvanian Hermosa Formation Unnamed upper member Gray marine fossiliferous sandy limestone, gray and greenish-gray sandstone and sandy shale, and red sandy shale. Exposed in ledges southwest of Moab fault in highway cut west of park entrance. 0-1,500 Hermosa Creek, Animas River Valley, Colo. 300 Paradox Member Salt, gypsum, and anhydrite, with black and gray shale and limestone. Few exposures in Salt and Cache Valleys. Forms slopes. 0-11,000 Paradox Valley, Colo. Unconformity Pennsylvanian(?) Unnamed conglomerate Yellow sandstone with boulders of limestone and chert containing Mississippian fossils. Exposed at two places in Salt Valley. ?