Bend meander of the Colorado River. This member may be separated from the Sewemup Member by a regional unconformity. Canyonlands and Glen Canyon area: Hoskinnini Member: Sandstone and siltstone. Found only in the southern part of the area. Black Dragon Member. Consists of a basal conglomerate; thinly bedded red sandstone, siltstone, and shale deposited in a tidal flat environment; a sandstone sheet; and a second sequence of tidal flat deposits. Sinbad Limestone Member. Named for the Sinbad region in the San Rafael Swell. Consists of yellowish limestone deposited by a brief marine transgression. Torrey Member. Red beds signifying a return to subaerial deposition. Moody Canyon Member. Thinly bedded slope forming siltstone and mudstone with minor evaporites. San Juan Basin and Tucumcari: Anton Chico Member. Described previously as the red sandstone member of the Santa Rosa Formation, but placed in its own formation after it was recognized to be middle Triassic in age. Subsequently, named as a member of the Moenkopi when its beds were traced west and demonstrated that it was deposited in a single basin with Moenkopi beds in Arizona. Other members listed in alphabetical order, with asterisks (*) indicating usage by the U.S. Geological Survey and other usages by state geological surveys: Holbrook Sandstone Member (AZ*) Moqui Member (AZ*) Rock Canyon Conglomerate Member (AZ*, NV*, UT*) Shnabkaib Member (AZ*, NV*, UT*) Timpoweap Member (AZ, NV, UT*) Virgin Limestone Member (AZ*, NV*, UT*) Winslow Member (AZ) Wupatki Member (AZ*) Places visible Found in these geologic locations: Black Mesa Basin* Great Basin province* Green River Basin* Las Vegas-Raton Basin Orogrande Basin Palo Duro Basin Paradox Basin* Piceance Basin* Plateau sedimentary province* San Juan Basin* Uinta Basin* Found within these parks (incomplete list): Grand Canyon National Park Capitol Reef National Park Zion National Park Monument Valley Navajo Nation Tribal Park Dinosaur National Monument Glen Canyon National Recreation Area Walnut Canyon National Monument Wupatki National Monument Fauna A diverse fossil vertebrate fauna has been described from the Moenkopi Formation, mainly from the Wupatki Member and Holbrook Member of northern Arizona. Described basal vertebrates include freshwater hybodont sharks, coelacanths, and lungfish. Temnospondyl amphibians are a common component of the fauna. Temnospondyli include Eocyclotosaurus, Quasicyclotosaurus, Wellesaurus, Vigilius, and Cosgriffius. The rhynchosaur Ammorhynchus is known, but rare. Anisodontosaurus is an enigmatic reptile only known from a few tooth-bearing jaws. The poposauroid archosaur Arizonasaurus is known from one relatively complete skeleton and a significant amount of