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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).