Moenkopi Formation: Difference between revisions

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Paradox Basin:<ref name="fillmore-2011-148-154">Fillmore 2011, p.148-154</ref><ref name="lucas-2017-151">Lucas 2017, p. 151</ref>
* Tenderfoot Member. This is everywhere in contact with the [[Cutler Formation]] on an angular unconformity. Up to {{convert|290|feet|meters|abbr=off}} thick, it consists of basal conglomerate, [[gypsum]], massive cliff-forming mudstone and silty sandstone.
* ''Ali Baba Member''. This is red conglomeratic sandstone and red siltstone and was laid down by energetic rivers. A distinctive feature is load structures. Sediment sources were apparently the crests of anticlines, and paleocurrent directions are north to northwest, along the corresponding synclines.
* ''Sewemup Member''. This is thinly bedded siltstone, shale, and sandstone, with enough gypsum content to give it a light brown color that contrasts with the darker brown Ali Baba Member.
* ''Parriott Member''. This is distinguished from the light brown Sewemup Member by its multihued brown, red, orange and purple strata. Exposures are geographically limited, appearing only in Richardson Amphitheater, [[Castle Valley, Utah|Castle Valley]], [[Sinbad Valley]], and Big Bend meander of the Colorado River. This member may be separated from the Sewemup Member by a regional unconformity.
 
Canyonlands and Glen Canyon area:<ref name="fillmore-2011-148-154"/>
* ''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:<ref name="lucas-hunt-1989"/>
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Other members listed in alphabetical order, with asterisks (*) indicating usage by the U.S. Geological Survey and other usages by state geological surveys:<ref name="GEOLEX database">GEOLEX database: Moenkopi</ref>
*''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==