Usage:
Frailes Formation (PR*)
Subunits:
Leprocomio Mudstone Member*
Geologic age:
Late Cretaceous (Campanian)*
Type section, locality, area and/or origin of name:
Type section: roadcuts on Highway 175 along left bank of Rio Grande de Loiza, west and north of Trujillo Alto, [San Juan quadrangle], Puerto Rico. Named from Barrio Frailes, east of Guaynabo (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 ([ ]).