Usage:
La Perla Shale Member of Yegua Formation of Claiborne Group (TX)
Geologic age:
early Tertiary (middle Eocene)
Type section, locality, area and/or origin of name:
Named from La Perla ranch house [ranch no longer exists; formerly located on bank of Rio Grande, south of Dolores, approx. Lat. 27 deg. 09 min. 32 sec. N., Long. 99 deg. 25 min. 41 sec. W., in north part of San Ygnacio 7.5-min quadrangle, Zapata Co.], southern TX (Patterson, 1942).
AAPG geologic province:
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 ([ ]).