Usage:
Los Negros Formation of Rio Orocovis Group (PR*)
Geologic age:
Early(?) Cretaceous*
Type section, locality, area and/or origin of name:
Type locality: in Rio Los Negros Valley btw. 51,800 N. and 52,140 N. (Puerto Rico Meter Grid System), Corozal quadrangle, north-central Puerto Rico (Nelson, 1966).
Type area: along Rio Los Negros and the Camion Del Blanco road btw. 51,680 N. and 53,710 N. (Nelson, 1966).
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 ([ ]).