Late Holocene sedimentary environments of south San Francisco Bay, California, illustrated in gravity cores
Open-File Report
2014-1198
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Abstract
Data are reported here from 51 gravity cores collected from the southern part of San Francisco Bay by the U.S. Geological Survey in 1990. The sedimentary record in the cores demonstrates a stable geographic distribution of facies and spans a few thousand years. Carbon-14 dating of the sediments suggests that sedimentation rates average about 1 mm/yr. The geometry of the bay floor and the character of the sediment deposited have remained about the same in the time spanned by the cores. However, the sedimentary record over periods of centuries or decades is likely to be much more variable. Sediments containing a few bivalve shells and bivalve or oyster coquinas are most often found west of the main channel and near the San Mateo Bridge. Elsewhere in the south bay, shells are rare except in the southernmost reaches where scattered gastropod shells are found.
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Late Holocene sedimentary environments of south San Francisco Bay, California, illustrated in gravity cores |
| Series title | Open-File Report |
| Series number | 2014-1198 |
| DOI | 10.3133/ofr20141198 |
| Year Published | 2014 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Contributing office(s) | Pacific Coastal and Marine Science Center |
| Description | Report: iv, 91 p.; Spatial Data; Metadata |
| Country | United States |
| State | California |
| Other Geospatial | San Francisco Bay |
| Online Only (Y/N) | Y |
| Google Analytic Metrics | Metrics page |