Usage:
Coamo Formation (PR*)
Geologic age:
Late Cretaceous*
Type section, locality, area and/or origin of name:
Type locality: exposures from a point south of Escuela Quebrada Grande, near the northwest corner of Coamo quadrangle, to near Quebrada Hondo in the south, south-central Puerto Rico. Named from the town of Coamo (Berryhill and others, 1960; name credited to Glover, 1961).
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 ([ ]).