Usage:
Rio Culebrinas Formation of Jacaguas Group (PR*)
Subunits:
Guacio Member (PR*)
Geologic age:
early Tertiary (middle Eocene)*
Type section, locality, area and/or origin of name:
Type locality: along Route 2 from the intersection with Route 417 (Puerto Rico Meter Grid System 75,700 E.; 59,600 N.) to the intersection with Route 402 (75,900 E.; 52,100 N.), Rincon quadrangle, northwestern Puerto Rico (McIntyre and others, 1970).
Named from exposures in Rio Culebrinas Valley, Lares district, northwestern Puerto Rico (US geologic names lexicon, USGS Bull. 1200).
AAPG geologic province:
Caribbean region*
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 ([ ]).