U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database
Geologic Unit: Saucelito
Map showing publication footprint
  • Usage in publication:
    • Saucelito member
  • Modifications:
    • Named
    • Biostratigraphic dating
  • Dominant lithology:
    • Siltstone
    • Sandstone
  • AAPG geologic province:
    • California Coast Ranges province
Publication:

Hall, C.A., Jr., 1962, Evolution of the echinoid genus Astrodapsis: University of California Publications in Geological Sciences, v. 40, no. 2, p. 47-180.


Summary:

Saucelito member named as youngest member (of 3) of Santa Margarita formation in Phoenix-Saucelito Creeks area, south-central part of San Luis Obispo Co, CA. Consists of alternating sequence of sandy siltstone or siltstone and arkosic arenite and wacke which locally contains stringers of chert pebbles. Composite columnar section and geologic map show unit is approximately 1700 feet thick and divided into lithological subunits. Overlies Phoenix member (new) of Santa Margarita formation. Age is late Miocene and early Pliocene (late Mohnian to late Delmontian microfaunal Stages). List of megafossils included.

Source: GNU records (USGS DDS-6; Menlo GNULEX).


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 ([ ]).

Accessibility FOIA Privacy Policies and Notices

USA Gov U.S. Department of the Interior | U.S. Geological Survey
Supported by the National Cooperative Geologic Mapping Program
Page Contact Information: Personnel
Page Last Modified: Thu 04 Apr 2024 04:16:29 PM MDT