Mary McGann R. Lawrence Phillips Tara A. Kneeshaw 20230828 comma-delimited text data release DOI: 10.5066/P9QQT6KZ Pacific Coastal and Marine Science Center, Santa Cruz, California U.S. Geological Survey https://doi.org/10.5066/P9QQT6KZ https://www.sciencebase.gov/catalog/item/64484560d34ee8d4aded3d32 Mary McGann Scott W. Starratt Liam M. Reidy Thomas D. Lorenson R. Lawrence Phillips Tara A. Kneeshaw 2023 data release DOI:10.5066/P9QQT6KZ Pacific Coastal and Marine Science Center, Santa Cruz, CA U.S. Geological Survey Suggested Citation: McGann, M., Starratt, S.W., Reidy, L., Lorenson, T.D., Phillips, R.L., and Kneeshaw, T.A., 2023, Radiocarbon measurements, census counts of benthic foraminifera, diatoms, and palynomorphs, and geochemistry from core 721-1 obtained in 2002 off San Francisquito Creek in South San Francisco Bay: U.S. Geological Survey data release, https://doi.org/10.5066/P9QQT6KZ. https://doi.org/10.5066/P9QQT6KZ This data release provides the measurement of anthropogenic metals and other elements in sediments of a core obtained off San Francisquito Creek in South San Francisco Bay. The urbanized area of downtown Menlo Park is subject to persistent flooding and sediment deposition by San Francisquito Creek in South San Francisco Bay. To mitigate these events, a suite of cores was collected in 2002 at the mouth of the creek to determine sediment depositional rates on the delta. One of those cores was selected for microbiological (pollen, diatoms, and foraminifera) and geochemical analyses to reconstruct a depositional record over the past two millennia. Based on an abrupt change in lithology and faunal assemblages, an instantaneous vertical displacement and deepening of the depositional environment is evident. Coseismic subsidence associated with large fault ruptures may cause these events. An age model based on the first appearances of non-indigenous biota, radiocarbon dates, radiochemistry, and sediment geochemistry suggests the 1868 rupture of the Hayward Fault may have been the cause. Additional information about the field activity from which these data were derived is available online at: https://cmgds.marine.usgs.gov/fan_info.php?fan=2002-603-DD Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. 2002 2023 Ground condition at time data were collected. Complete None planned -122.0961 -122.0961 37.4583 37.4583 ISO 19115 Topic Category environment society geoscientificInformation Data Categories for Marine Planning Habitat Substrate USGS Thesaurus chemical analysis geochemistry mass spectroscopy marine chemistry Marine Realms Information Bank (MRIB) keywords bay gravity coring mercury analysis pollutant-sediment interactions sediment deposition sediment geochemistry None U.S. Geological Survey USGS Coastal and Marine Hazards and Resources Program CMHRP Pacific Coastal and Marine Science Center PCMSC benthic foraminifera USGS Metadata Identifier USGS:64484560d34ee8d4aded3d32 Geographic Names Information System (GNIS) San Francisco Bay San Francisquito Creek Hooks Point None USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originators of the dataset and in products derived from these data. U.S. Geological Survey, Pacific Coastal and Marine Science Center PCMSC Science Data Coordinator mailing and physical

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Santa Cruz CA 95060 650-329-4979 pcmsc_data@usgs.gov Mac OSX 13.3.1, Microsoft Excel 16.72 for Mac Because the methods used to perform the analyses of the metal content in the sediment are not available, it is not possible to state what formal calibrations tests were conducted. Because the methods used to perform the analyses of the metal content in the sediment are not available, it is not possible to state what formal logical accuracy tests were conducted. Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the metadata for each part of this data release carefully for additional details. A formal accuracy assessment of the horizontal positional information in the data set has not been conducted. The horizontal position was estimated based on distances from the modern tidal channel listed on a figure provided to the first author in October 2003. The horizontal accuracy cannot be determined. A metal core barrel, approximately 9 cm in diameter, was driven into the mudflat slightly northwest of Hooks Point on informally named "Hooks Island" in South San Francisco Bay near Palo Alto, California in 2002 to recover a sediment core. The precise coring location is not available. The core was brought to the the USGS facility in Menlo Park, California and housed in a core refrigerator. 2002 Twenty-three sediment samples were measured for the presence of anthropogenic metals and elements every approximately 5 to 10 cm downcore between the surface and 168 cm in core 721-1. The methods used for these measurements are not available. 2003 Point Point 23 0.0001 0.0001 Decimal degrees North American Datum of 1927 Clarke 1866 6378206.4 294.978698214 A comma-separated values file with the first line being a header line. Results of metal content of fine sediment. Producer defined. Date_Collected Date in year. Producer defined. 2002 2002 Latitude Latitude of the site at which the push core was collected. Producer defined. 37.4583 37.4583 decimal degrees 0.0001 Longitude Longitude of the site at which the push core was collected. Producer defined. -122.0961 -122.0961 decimal degrees 0.0001 Sample_Upper_Depth_Limit_cm The upper depth at which the sediment sample was obtained below the sediment surface in a core. Producer defined. 0.0 167.5 centimeters 0.1 Sample_Lower_Depth_Limit_cm The lower depth at which the sediment sample was obtained below the sediment surface in a core. Producer defined. 0.0 168.5 centimeters 0.1 Antimony_content_ppm Antimony content of fine sediment Producer defined 0.34 1.02 parts per million 0.01 Arsenic_content_ppm Arsenic content of fine sediment Producer defined 5.5 11.5 parts per million 0.1 Barium_content_ppm Barium content of fine sediment Producer defined 367 429 parts per million 1 Beryllium_content_ppm Beryllium content of fine sediment Producer defined 1.1 1.4 parts per million 0.1 Bismuth_content_ppm Bismuth content of fine sediment Producer defined 0.17 0.53 parts per million 0.01 Cadmium_content_ppm Cadmium content of fine sediment Producer defined 0.09 1.51 parts per million 0.01 Cerium_content_ppm Cerium content of fine sediment Producer defined 33.9 40.3 parts per million 0.1 Cesium_content_ppm Cesium content of fine sediment Producer defined 4.43 6.19 parts per million 0.01 Chromium_content_ppm Chromium content of fine sediment Producer defined 151 323 parts per million 1 Cobalt_content_ppm Cobalt content of fine sediment Producer defined 14.2 17.2 parts per million 0.1 Copper_content_ppm Copper content of fine sediment Producer defined 35.4 69.7 parts per million 0.1 Gallium_content_ppm Gallium content of fine sediment Producer defined 14.7 17.0 parts per million 0.1 Germanium_content_ppm Germanium content of fine sediment Producer defined 0.1 0.2 parts per million 0.1 Hafnium_content_ppm Hafnium content of fine sediment Producer defined 1.29 1.70 parts per million 0.01 Indium_content_ppm Indium content of fine sediment Producer defined 0.05 0.08 parts per million 0.01 Lanthanum_content_ppm Lanthanum content of fine sediment Producer defined 16.0 19.4 parts per million 0.1 Lead_content_ppm Lead content of fine sediment Producer defined 10.4 40.1 parts per million 0.1 Lithium_content_ppm Lithium content of fine sediment Producer defined 50 64 parts per million 1 Lutetium_content_ppm Lutetium content of fine sediment Producer defined 0.19 0.23 parts per million 0.01 Manganese_content_ppm Manganese content of fine sediment Producer defined 447 710 parts per million 1 Mercury_content_ppb Mercury content of fine sediment Producer defined 66 530 parts per billion 1 Molybdenum_content_ppm Molybdenum content of fine sediment Producer defined 1.34 5.16 parts per million 0.01 Nickel_content_ppm Nickel content of fine sediment Producer defined 80.5 98.5 parts per million 0.1 Niobium_content_ppm Niobium content of fine sediment Producer defined 0.6 7.2 parts per million 0.1 Phosphorus_content_ppm Phosphorus content of fine sediment Producer defined 530 1010 parts per million 1 Rubidium_content_ppm Rubidium content of fine sediment Producer defined 71.2 96.5 parts per million 0.1 Scandium_content_ppm Scandium content of fine sediment Producer defined 15.5 18.9 parts per million 0.1 Selenium_content_ppm Selenium content of fine sediment Producer defined 1 1 parts per million 1 Silver_content_ppm Silver content of fine sediment Producer defined 0.01 2.99 parts per million 0.01 Strontium_content_ppm Strontium content of fine sediment Producer defined 112 179 parts per million 1 Tantalum_content_ppm Tantalum content of fine sediment Producer defined 0.42 0.83 parts per million 0.01 Tellurium_content_ppm Tellurium content of fine sediment Producer defined 0.04 0.15 parts per million 0.01 Terbium_content_ppm Terbium content of fine sediment Producer defined 0.53 0.62 parts per million 0.01 Thallium_content_ppm Thallium content of fine sediment Producer defined 0.33 0.53 parts per million 0.01 Thorium_content_ppm Thorium content of fine sediment Producer defined 7.0 10.1 parts per million 0.1 Tin_content_ppm Tin content of fine sediment Producer defined 1.2 7.8 parts per million 0.1 Tungsten_content_ppm Tungsten content of fine sediment Producer defined 0.8 1.1 parts per million 0.1 Uranium_content_ppm Uranium content of fine sediment Producer defined 1.9 3.3 parts per million 0.1 Vanadium_content_ppm Vanadium content of fine sediment Producer defined 123 142 parts per million 1 Ytterbium_content_ppb Ytterbium content of fine sediment Producer defined 1.3 1.7 parts per billion 0.1 Yttrium_content_ppm Yttrium content of fine sediment Producer defined 13.6 15.8 parts per million 0.1 Zinc_content_ppm Zinc content of fine sediment Producer defined 86 133 parts per million 1 Zirconium_content_ppm Zirconium content of fine sediment Producer defined 56.0 67.6 parts per million 0.1 The first line of the comma-separated values file is a header line. U.S. Geological Survey U.S. Geological Survey - ScienceBase mailing and physical

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Denver CO 80225 1-888-275-8747 sciencebase@usgs.gov These data are available in a comma-delimited text file (SFC_metals_data.csv) which contains results of the measurement of anthropogenic metals and other elements from core 721-1 obtained in 2002 off San Francisquito Creek in South San Francisco Bay. Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. comma-delimited text Microsoft Excel 16.72 for Mac .csv file none 0.0590 https://www.sciencebase.gov/catalog/file/get/64484560d34ee8d4aded3d32 https://doi.org/10.5066/P9QQT6KZ Data can be downloaded using the Network_Resource_Name links. This first link begins a direct download of the data and metadata. The second link points to the landing page for the data release. None. These data can be viewed with any text editor software. 20230828 U.S. Geological Survey, Pacific Coastal and Marine Science Center PCMSC Science Data Coordinator mailing and physical

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Santa Cruz CA 95060 831-427-4747 pcmsc_data@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998