- Usage in publication:
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- Oak Springs Cliffs Member
- Modifications:
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- Named
- Dominant lithology:
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- Sandstone
- AAPG geologic province:
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- Black Mesa basin
Summary:
Named as one (of five) member of De Chelly [sic] Sandstone. Was referred to as the transition, as a tongue of Supai Formation, middle member [of De Chelly?], and as Yeso Formation in earlier reports. Type section is at Oak Springs Cliffs. Is best developed at Oak Springs Cliffs where it is 128 feet thick; is 45 feet thick at Canyon de Chelly and 16 feet thick at Nazlini Canyon, Apache Co, AZ in the Black Mesa basin. Thins northward along east flank of Defiance Plateau. Consists of slope-forming, non-cross-stratified, red, calcareous, micaceous sandstones and silty sandstones. Overlies Hunter Point Member (new) of De Chelly; underlies White House Member (new) of De Chelly. Permian 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 ([ ]).