Usage:
El Rayo Formation (PR*)
Geologic age:
Late Cretaceous (Maastrichtian)*
Type section, locality, area and/or origin of name:
Type locality: south of Sabana Grande, [Sabana Grande quadrangle], southwestern Puerto Rico (Volckman, 1984).
Named from Quebrada de El Rayo, a small intermittent stream, 2.5 km south of Sabana Grande, Sabana Grande quadrangle, southwestern Puerto Rico (Slodowski, 1958; see Volckman, 1984).
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 ([ ]).