- Usage in publication:
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- Arikareean age
- Modifications:
-
- Original reference
- AAPG geologic province:
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- Denver basin
Summary:
Pg. 11, pl. 1. Arikareean age. Provincial time term based on the Arikaree group of western Nebraska, Agate being the most typical locality, with the limits as redefined by Schultz (1938) but including Rosebud beds. Includes time between Whitneyan (Oligocene) and Hemingfordian (Miocene) ages. [In lower part of Miocene; = DICERATHERIUM faunal zone.] Report defines 18 provincial time terms, based on mammal-bearing units, for North American continental Tertiary. [For sequence see under Puercan.]
Source: US geologic names lexicon (USGS Bull. 1200, p. 133).
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 ([ ]).