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GEOREF RECORD

Foraminiferal and sedimentological trends in the Tertiary section of Tecolote Tunnel, California

Orville L. Bandy and Ronald L. Kolpack
Foraminiferal and sedimentological trends in the Tertiary section of Tecolote Tunnel, California
Micropaleontology (1963) 9 (2): 117-170

Abstract

A quantitative study was made of the microfossil and sedimentology of most of the Tertiary section in Tecolote Tunnel, Santa Barbara County, California. Foraminiferal evidence indicates that the Cozy Dell shale and Coldwater sandstone are middle Eocene bathyal deposits with an abundance of turbidites. A major middle Tertiary basinal cycle commenced in the Oligocene with the alluvial fan deposits of the Sespe Formation, giving way to middle bathyal deposits with turbidites in the upper Vaqueros Sandstone and Richon Shale formations, and finally to deeper-silled basin deposits in the Mohnian part of the Monterey Shale, also with turbidites. One planktonic foraminiferal zone is recognized for the middle Eocene, and 3 were established for the Miocene. Carbonate/nitrogen ratios were useful in selecting the division between the nonmarine Sespe Formation and the marine paralic facies of the basal Vaqueros Sandstone. The stages of the California Miocene are adjusted to the standard European section by evaluating the Orbulina universa datum.


ISSN: 0026-2803
Coden: MCPLAI
Serial Title: Micropaleontology
Serial Volume: 9
Serial Issue: 2
Title: Foraminiferal and sedimentological trends in the Tertiary section of Tecolote Tunnel, California
Pages: 117-170
Published: 1963
Text Language: English
Publisher: American Museum of Natural History, New York, NY, United States
Accession Number: 1963-007006
Categories: Sedimentary petrologyInvertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus., tables
N32°30'00" - N42°00'00", W124°30'00" - W114°15'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Bibliography and Index of North American Geology, U. S. Geological Survey, Reston, VA, United States
Update Code: 1963
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