- Usage in publication:
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- Desert member
- Modifications:
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- Named
- Dominant lithology:
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- Sandstone
- AAPG geologic province:
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- Paradox basin
Summary:
Named as the upper member (of six) of Blackhawk formation for exposures in nearly vertical cliffs of Mt. Elliot east of Desert, siding of the DRGWRR, T20N, R14E, Emery Co, UT in the Paradox basin. No type locality designated. Overlies Grassy member (new) of Blackhawk formation. Underlies Castlegate sandstone. Consists of medium-grained, thin-bedded to massive sandstone about 70 ft thick and coal-bearing rocks 50 to 80 ft thick. Has many thin unminable lenses of coal. The uppermost of nine bar sandstones in the Desert tongues into Mancos shale. Cross sections. Identified east of the Green River into adjacent Grand Co. Late Cretaceous age.
Source: GNU records (USGS DDS-6; Denver GNULEX).
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates published by U.S. Geological Survey authors.
"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).
Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).