- Usage in publication:
-
- Crowder Formation*
- Modifications:
-
- Named
- Dominant lithology:
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- Sandstone
- AAPG geologic province:
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- Mojave basin
Summary:
Named for Crowder Canyon, location of type locality at S/2 sec.13, secs.24-26 T3N R6W, Cajon Pass area Mojave Desert, CA. Consists of gray white to buff white sandstone weakly consolidated with fanglomerate. About 1800 ft thick at Crowder and Cajon Canyons, thinning to northwest and southeast. Overlies Punchbowl Formation; conformably underlies alluvium. Age, determined by stratigraphic relations with overlying and underlying rocks, is Pliocene.
Source: GNU records (USGS DDS-6; Menlo 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 ([ ]).