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The Moenkopi Formation is a geological formation that is spread across the U.S. states of New Mexico, northern Arizona, Nevada, southeastern California, eastern Utah and western Colorado. This unit is considered to be a group in Arizona.
Ancient wave ripple marks in sandstone, Moenkopi Formation, Capitol Reef National Park, Utah. In geology, ripple marks are sedimentary structures (i.e., bedforms of the lower flow regime) and indicate agitation by water (current or waves) or directly by wind.
Ripple marks in Moenkopi Formation rock. Local climatic conditions were wetter and more tropical in the Early Triassic than they were previously. In the Capitol Reef area the resulting Moenkopi Formation is divided into four members (from oldest to youngest): [6] Black Dragon Member; Sinbad Limestone Member, Torrey Member, and; Moody Canyon Member.
Moenkopia (meaning "for Moenkopi") is an extinct genus of prehistoric sarcopterygians from the Coelacanthidae [1] found in the Middle Triassic Moenkopi Formation of Arizona.The type, and only species, M. wellesi, was named in 1961 in honour of Samuel Paul Welles. [2]
The Shinarump was laid down in braided streams that flowed through valleys eroded into the underlying Moenkopi Formation. [8] This member of the Chinle forms prominent cliffs with thickness up to 200 feet (60 m), and its name comes from a Native American word meaning "wolf's rump" (a reference to the way this member erodes into gray, rounded ...
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A bedform is a geological feature that develops at the interface of fluid and a moveable bed, the result of bed material being moved by fluid flow. Examples include ripples and dunes on the bed of a river .
Within the Marble Canyon and eastern Grand Canyon regions and south into Verde Valley, upper contact of the Kaibab Limestone with the Moenkopi Formation is an erosional disconformity. This disconformity exhibits little relief and is identified by marked differences in color, topography, and rock types between tan, ledge-forming, calcareous ...
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