- Usage in publication:
-
- Blancan age
- Modifications:
-
- Original reference
- AAPG geologic province:
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- Permian basin
Summary:
Pg. 12, pl. 1. Blancan age. Provincial time term, based on the local fauna at "Mt. Blanco" and adjoining draws, near "old rock house," north of Crawfish Draw, Crosby County, Texas. Covers an interval in the upper Pliocene above the Hemphillian age. [= PLESIPPUS 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. 381-382).
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 ([ ]).