- Usage in publication:
-
- North Wash facies
- Modifications:
-
- Named
- Dominant lithology:
-
- Sandstone
- Siltstone
- AAPG geologic province:
-
- Paradox basin
Summary:
Named as an informal unit of the Torrey Member of the Moenkopi Formation for North Wash a tributary of the Colorado River about 2 mi south of the mouth of the Dirty Devil River. No type locality designated. Known in parts of the Orange Cliffs and Island of the Sky areas. Is present in the southeastern San Rafael Swell, Teasdale uplift, and Circle Cliffs. Consists of ledgy sandstones 0.5 to 6 ft thick with interbedded flaggy, ripple marked siltstone and sandstone. Finely laminated siltstone and mudstone are also present. Was probably deposited on a delta plain in Early Triassic time.
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 ([ ]).