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National Geologic Map Database

Geologic Unit: Lomas

Usage:

Lomas Formation (PR*)


Geologic age:

Late Cretaceous*


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

Type locality: roadcut in southwestern part of Barrio Lomas (Puerto Rico Meter Grid System 207,890 E.; 48,750 N.), 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 ([ ]).