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National Geologic Map Database

Geologic Unit: Cambalache

Usage:

Cambalache Formation (PR*)


Subunits:

Toma de Agua Vitrophyre Member (PR*).


Geologic age:

Late Cretaceous (Turonian)*


Type section, locality, area and/or origin of name:

Type locality: roadcut on unpaved road in southeast corner of Barrio Canovanas (Puerto Rico Meter Grid System 210,975 E.; 57,450 N.), Quebrada Cambalache, northeastern Gurabo quadrangle, northeastern Puerto Rico (Seiders, 1971).


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 ([ ]).