Title: Description of gravity cores from San Pablo Bay and Carquinez Strait, San Francisco Bay, California
Abstract: First posted June 27, 2017 For additional information, contact: Pacific Coastal and Marine Science CenterU.S. Geological Survey 2885 Mission St.Santa Cruz, CA 95060 Seventy-two gravity cores were collected by the U.S. Geological Survey in 1990, 1991, and 2000 from San Pablo Bay and Carquinez Strait, California. The gravity cores collected within San Pablo Bay contain bioturbated laminated silts and sandy clays, whole and broken bivalve shells (mostly mussels), fossil tube structures, and fine-grained plant or wood fragments. Gravity cores from the channel wall of Carquinez Strait east of San Pablo Bay consist of sand and clay layers, whole and broken bivalve shells (less than in San Pablo Bay), trace fossil tubes, and minute fragments of plant material.