100 Late Cretaceous Mancos Shale Lead-gray fossiliferous marine shale. Forms slopes. ? Mancos, Colo. Dakota Sandstone Conglomeratic sandstone, gray shale, carbonaceous shale, and coal. Forms ledge. 100 Dakota, Nebr. Unconformity Late Jurassic Morrison Fm. 700 Morrison, Colo. Brushy Basin Member Variegated shale, some sandstone and conglomerate, petrified wood, chert, and dinosaur bones. May contain some beds of Burro Canyon (Early Cretaceous) age. Salt Wash Member Crossbedded white and gray conglomeratic sandstone beds and lenses, locally carnotite bearing, and red and gray sandy mudstone. Forms slopes. Unconformity 160 San Rafael Group (San Rafael Swell, Utah) Summerville Fm. Thin bedded red sandstone and shale. Some cherty limestone concretions. Forms slopes. 0-40 Summerville Point, Utah Entrada Ss. (Entrada Point, Utah) Moab Member White, crossbedded fine-grained sandstone. Caps Slick Rock Member north of Devils Garden and Fiery Furnace and on Klondike Bluffs. 0-100 Moab, Utah Slick Rock Member Salmon-colored to pink and white fine-grained generally crossbedded sandstone, containing some medium- to coarse-grained sand. Generally forms cliffs or narrow fins many of which contain arches or windows. 0-240 Slick Rock, Colo. Dewey Bridge Member Red muddy sandstone and sandy mudstone, with contorted bedding. Forms easily eroded bases to arches in Windows Section, hence aided in their development. 0-175 Dewey Bridge, Utah Unconformity 190 Jurassic and Triassic(?); Glen Canyon Group Navajo Sandstone Massive crossbedded buff, gray, and white fine-grained sandstone, and local beds of gray limestone. Forms cliffs along Colorado River, floors Windows Section. 0-350 Navajo Country, Four Corners (Glen Canyon, U.) Late Triassic(?) Kayenta Formation Lavender, gray, and white lenses of sandstone, red sandy shale, and conglomerate. Contains some freshwater shells. Caps and protects cliffs of Wingate Sandstone. 0-250 Kayenta, Ariz. Late Triassic Wingate Sandstone Massive, horizontally bedded and crossbedded reddish buff fine-grained sandstone.