Usage:
Pina Siltstone Member of El Ocho Formation (PR*)
Geologic age:
Cretaceous*
Type section, locality, area and/or origin of name:
Type section: roadcuts on Highway 827 (Puerto Rico Meter Grid System 174,430 E.; 57,990 N. to 174,314 E.; 57,743 N.), Naranjito quadrangle. Named from valley of Quebrada Pina, Puerto Rico (Pease, 1968).
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 ([ ]).