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National Geologic Map Database

Geologic Unit: Rosarito Beach

Usage:

Rosarito Beach Formation (CA, Mexico)


Subunits:

In Mexico: Mira al Mar Member, Costa Azul Member, Amado Nervo Member, Las Glorias Member, Los Buenos Member.
In California: Otay Member, Sweetwater Member.


Geologic age:

late Tertiary (Miocene)


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

Type sections (of members): in Tijuana-Rosarito Beach area, Baja California, Mexico (Minch, 1967); also, in US, along south side of Sweetwater Valley (Sweetwater Member), and northeeast side of Chester Canyon (Otay Member), San Diego Co., CA (Kuper and Gastil, 1977).


AAPG geologic province:

Peninsular Ranges province


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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).