- Usage in publication:
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- White Cliffs sub-chalk
- Modifications:
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- First used
- Dominant lithology:
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- Chalk
- AAPG geologic province:
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- Ouachita folded belt
Summary:
First used as lowest formation of the Chalky marl beds division of the Upper Cretaceous or Exogyra costata series. Name apparently derived from exposures along the White Cliffs of Little River, sec 35, T11S, R29W, southeast Sevier Co, AR in Ouachita tectonic belt province. Consists of fossiliferous, impure chalk composed of glauconite and arenaceous grains cemented by calcareous matrix, 30 feet thick at White Cliffs. Fossils include INOCERAMUS BARABINI, BACULITES OVATUS, EXOGYRA COSTATA. Is lowest Upper Cretaceous horizon seen in AR. Is listed above Rocky Comfort (Niobrara) chalk; however, contact not observed in AR. Underlies White Cliffs chalk. [At the time this report was published, a Middle Cretaceous Series was recognized--to which the Rocky Comfort was assigned.]
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 ([ ]).