Timpoweap Member of Moenkopi Formation

Usage of Geologic Unit Name:
Timpoweap Member of Moenkopi Formation (AZ*,NV,UT*)
Triassic, Early*
Geologic Province:
Plateau sedimentary province*
Great Basin province*
Areal Extent:
Type Locality:
Not designated. Derivation of name not stated (Gregory, 1948).
Reference sections proposed in Washington Co., UT: 1) at Isom Wash-Virgin River intersection, NE/4 SW/4 SE/4 sec. 19, T. 41 S., R. 12 W.; 2) at Isom Wash-UT Hwy 15 intersection, SW/4 SW/4 NE/4 sec. 30, T. 41 S., R. 12 W.; 3) at first wash east of Isom Creek, SW/4 NE/4 NE/4 sec. 30, T. 41 S., R. 12 W.; 4) NE/4 NW/4 NE/4 sec. 29, T. 41 S., R. 12 W. (Nielson and Johnson, 1979).
Unit Name History:
First published use as basal member of Moenkopi Formation (Gregory, 1948). Overview (Gregory, 1950). Reference (Nielson and Johnson, 1979).


Gregory, H.E., 1948, Geology and geography of central Kane County, Utah: Geological Society of America Bulletin, v. 59, no. 3, p. 211-247.

Gregory, H.E., 1950, Geology and geography of the Zion [National] Park region, Utah and Arizona: U.S. Geological Survey Professional Paper, 220, 200 p.

Nielson, R.L. and Johnson, J.L., 1979, The Timpoweap Member of the Moenkopi Formation, Timpoweap Canyon, Utah: Utah Geology, v. 6, no. 1, p. 17-27.

Doelling, H.H., Blackett, R.E., Hamblin, A.H., Powell, J.D., and Pollock, G.L., 2000, Geology of Grand Staircase - Escalante National Monument: In Geology of Utah's Parks and Monuments, Sprinkel, D.A., Chidsey, T.C., and Anderson, P.B., editors, Utah Geological Association Publication 28., p. 189-231.

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Note that data on this page contains information that has been partly revised from bibliographic resources available via the National Geologic Map Database GEOLEX:
The URL is: https://gotbooks.miracosta.edu/gonp/coloradoplateau/lexicon/moenkopi_timpoweap.htm
Last modified: 1/7/2011