Usage:
Collao Member of Robles Formation (PR*)
Geologic age:
Late Cretaceous*
Type section, locality, area and/or origin of name:
Type section: exposures along Highway 1 from 1.1 km S. 75 deg. E of intersection of Highways 1 and 162, extending northwest along the banks of the highways and up north side of ridge south of Highway 162 to top of ridge, northwest of Quebrada Collao, Cayey quadrangle, Puerto Rico (Berryhill and Glover, 1960).
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 ([ ]).