- Usage in publication:
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- Whitneyan age
- Modifications:
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- Original reference
- AAPG geologic province:
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- Chadron arch
Summary:
Pg. 11, pl. 1. Whitneyan age. Provincial time term, based on Whitney member of Brule formation, type locality, Whitney, northwestern Nebraska. Includes old term, "PROTOCERAS-LEPTAUCHENIA beds," used in the most extended sense. Covers interval between the Orellan (Oligocene) and Arikareean (Miocene) ages. [In upper part of Oligocene; = PROTOCERAS faunal zone.] Report defines 18 provincial time terms, based on mammal-bearing units, for the North American continental Tertiary. [For sequence see under Puercan.]
Source: US geologic names lexicon (USGS Bull. 1200, p. 4220).
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 ([ ]).