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- Usage in publication:
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- Tiffanian age
- Modifications:
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- Original reference
- AAPG geologic province:
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- San Juan basin
Summary:
Pg. 9, pl. 1. Tiffanian age. Provincial time term, based on Tiffany local fauna, often used in a more extended sense as a faunal level, northern rim of San Juan basin, southwestern Colorado. Includes interval between Paleocene Torrejonian (older) and Clarkforkian ages. [In upper part of Paleocene; = lower part of PLESIADAPIS faunal zone.] Report defines 18 provincial time terms, based on mammal-bearing units, for North American continental Tertiary. [For sequence see under Puercan.]
Typical area: Mason pocket, in sec. 20, T. 33 N., R. 6 W., [La Plata Co., southwestern CO].
Source: US geologic names lexicon (USGS Bull. 1200, p. 3885).
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 ([ ]).