Usage:
Tortugas Andesite (PR*)
Geologic age:
Late Cretaceous (Coniacian to Campanian)*
Type section, locality, area and/or origin of name:
Type section: north face of quarry btw. 188,800 E.; 53,800 N. and 189,000 E. (Puerto Rico Meter Grid System) (Pease, 1968). Named from Barrio Tortugas, San Juan district, San Juan quadrangle (Kaye, 1959).
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 ([ ]).