150 Jurassic Entrada Sandstone Crossbedded white fine-grained sandstone at top (Moab Member); salmon colored to pink, fine-grained, generally crossbedded sandstone in middle (Slick Rock Member); red earthy sandstone and siltstone at base (Dewey Bridge Member, grades into Carmel Formation west of Green River). Forms steep-sided buttes north, east, and west of park. 400-500 Entrada Point, San Rafael Swell, Utah 175 Jurassic & Triassic(?) Glen Can Group Navajo Sandstone Crossbedded buff to gray sandstone, some red sandstone, and thin beds of limestone. Residual rounded patches on highest mesas. 325-550 Navajo Country, Ariz., New Mexico, Utah Late Triassic(?) Kayenta Formation Irregularly bedded stream-laid gray, buff, lavender and red fine-to-coarse-grained sandstone and siltstone. Caps most high mesas and forms tops of highest cliffs. Contains fresh-water fossils. 160-300 Glen Canyon, S. Utah, Kayenta, Arizona 200 Late Triassic Wingate Sandstone Buff and light red generally crossbedded medium-grained sandstone. Forms highest cliffs, many of which are coated with black desert varnish. 210-340 Ft. Wingate, New Mexico Chinle Fm. Unnamed upper member Reddish siltstone, mudstone, and sandstone locally bleached to bluish or greenish gray, and few thin beds of limestone. Forms steep slopes at base of highest cliffs. Contains some fossil wood and reptile bones. 205-740 Chinle Valley, Ariz. Moss Back Mbr Gray, brown, and gray-green sandstone and conglomerate. 0-80 Moss Back Ridge, Utah 215 Middle(?) and Early Triassic Moenkopi Fm. Unnamed upper member Brick red, reddish-brown, and brown mudstone and sandstone, and some conglomerate and gypsum. Forms slopes broken by thin ledges. 250-940 Moenkopi Wash, Ariz. Triassic(?) Hoskinnini Tongue Pale-brown fine-to-coarse-grained sandstone; forms ledges. 0-120 Hoskinnini Mesa, Ariz. 250 Permian Cutler Fm. Undivided Cutler Formation in northeastern part of area is composed of buff, red, and purple arkosic sandstone and conglomerate. South of Indian Creek is the thick Cedar Mesa Sandstone Member, composed of massive