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National Geologic Map Database

Geologic Unit: Altamira

Usage:

Altamira Shale Member of Monterey Shale (CA*)


Subunits:

(alphabetical): Miraleste Tuff Bed (CA*), Portuguese Tuff Bed (CA*).


Geologic age:

late Tertiary (early? and middle Miocene)*


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

Type region [area]: south slope of hills along and adjoining Altamira Canyon, Palos Verdes Hills [San Pedro 7.5-min quadrangle, Los Angeles Co.], southern CA (Woodring and others, 1936).


AAPG geologic province:

Los Angeles basin*


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 ([ ]).