Detailed lithostratigraphic characterization of Chico Martinez Creek, California

• Main Author: Mosher, Annie
• Format: Thesis
• Language: English
• Published: California State University, Long Beach 2013
• Subjects: Petroleum Geology|Sedimentary Geology; Antarctic; East Antarctic Ice Sheet; Antarc*; Ice Sheet
• Online Access: http://pqdtopen.proquest.com/#viewpdf?dispub=1527400

A 6012-foot Monterey Formation succession at Chico Martinez Creek, San Joaquin basin, is characterized at high spatial resolution by spectral gamma-ray data in 2- foot increments, 5-foot lithologic descriptions, and qualitative XRD and FTIR analysis. Based on these data, the 4 Monterey members–the Gould, Devilwater, McDonald and Antelope shales–are subdivided into 7 distinctive lithofacies. New paleomagnetic data, combined with industry-provided biostratigraphy establishes a chronostratigraphic framework and allows determination of linear sediment accumulation rates. Condensed sedimentation at the onset of McDonald deposition (~14 Ma) is also observed in correlative members in the Pismo, Santa Maria and Santa Barbara basins. This regional event is associated with eustatic regression from the Mid-Miocene highstand related to formation of the East Antarctic Ice Sheet and ongoing thermotectonic basin subsidence. A surge in linear sediment accumulation rates in the siliceous upper McDonald and Antelope (~10.4 Ma) is attributed to a regional increase in diatom productivity.