Usage:
No current usage.
(†Pinto Limestone (TX) considered synonymous with Austin Chalk. See Austin.)
Geologic age:
Late Cretaceous
Type section, locality, area and/or origin of name:
Not designated. Name applied to chalky limestone exposed in bluffs along Rio Grande, in vicinity of Piedro Pinto Creek, Kinney Co., TX (Dumble, 1892). [From GNU records (USGS DDS-6; Denver GNULEX)]
[Discrepancy concerning derivation of name. According to US geologic names lexicons (USGS Bull. 896, 1200), named from Pinto Creek, Val Verde Co., TX. GNU records (USGS DDS-6; Denver GNULEX) state differently. --unresolved.]
AAPG geologic province:
Ouachita folded belt
Gulf Coast basin
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 ([ ]).