Joanne C.T. Ferreira Samantha C. McGill Angela C. Tan Jessica R. Lacy 20250319 2.0 Comma-separated values data release doi:10.5066/P98BL0XF Pacific Coastal and Marine Science Center, Santa Cruz, California U.S. Geological Survey Ferreira, J.C.T, McGill, S.C., Tan, A.C., Lacy, J.R., Grain size, bulk density, and carbon content of sediment collected from Whale's Tail South marsh and adjacent bay floor, South San Francisco Bay, California, 2021-2022 (ver. 2.0, March 2025): U.S. Geological Survey data release, https://doi.org/10.5066/P98BL0XF. https://doi.org/10.5066/P98BL0XF Sediment samples were collected on and adjacent to the Whale's Tail South marsh. Short push-cores of bed sediment were collected in South San Francisco Bay adjacent to Whale's Tail South marsh on five days from June through August 2021 and 3 days from November 2021 to January 2022. Additional samples were taken from sediment deposited on ceramic tiles attached to the marsh surface and from rip-up clasts deposited on the marsh edge. Samples were analyzed for sediment properties including bulk density, particle size distribution, and percent carbon. These data were collected as part of a collaborative study with the USGS Western Ecological Research Center to quantify sediment fluxes, deposition on the marsh, and changes in marsh morphology at Whale's Tail marsh in southern San Francisco Bay. These data are intended for researchers, students, policy makers, and the general public. Information about the data collection field activities can be found at: https://cmgds.marine.usgs.gov/fan_info.php?fan=2021-627-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2021-660-FA Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. 20210604 20220128 ground condition at time sample was collected Complete None planned -122.17052 -122.14129 37.58646 37.58202 USGS Metadata Identifier USGS:c5baa8ef-205e-49f1-b097-f00c08798a2f ISO 19115 Topic Category oceans Data Categories for Marine Planning Substrate USGS Thesaurus ocean processes sediment transport grain-size analysis push coring grab sampling sea-floor characteristics unconsolidated deposits sediment transport bulk density carbon dissolved organic compounds Marine Realms Information Bank (MRIB) keywords Sediment None USGS U.S. Geological Survey PCMSC Pacific Coastal and Marine Science Center CMHRP Coastal and Marine Hazards and Resources Program Geographic Names Information System (GNIS) San Francisco Bay State of California none Whale’s Tail marsh Whale’s Tail South marsh Cargill marsh Eden Landing Ecological Reserve No access constraints 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 (USGS) as the originator 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

2885 Mission Street

Santa Cruz CA 95060 831-427-4747 pcmsc_data@usgs.gov WT_21_sample_locations.png Map with sample locations. Diameter of the sample marker indicates the grain size in the surface layer for which 50 percent of the sediment is coarser. png Data were collected as part of a collaborative study with the USGS Western Ecological Research Center. Joanne C. T. Ferreira Jessica R. Lacy Samantha C. McGill Lukas WinklerPrins Daniel J. Nowacki Andrew W. Stevens Angela C. Tan 2023 Ferreira, J.C.T., Lacy, J.R., McGill, S.C., WinklerPrins, L.T., Nowacki, D.J., Stevens, A., and Tan, A., 2023, Hydrodynamic and sediment transport data from Whale's Tail marsh and adjacent waters in South San Francisco Bay, California 2021-2022: U.S. Geological Survey data release, https://doi.org/10.5066/P972R6AW. https://doi.org/10.5066/P972R6AW Beckman-Coulter 2011 Beckman-Coulter, 2011, Instructions for Use: LS 13 320 Laser Diffraction Particle Size Analyzer: Brea, Calif., Beckman-Coulter, 246 p. https://www.beckmancoulter.com/wsrportal/techdocs?docname=b05577ab.pdf Robert E. Carver 1971 Carver, R.E., 1971, Procedures in Sedimentary Petrology: Wiley Interscience, New York: 49-94. https://tamug-ir.tdl.org/handle/1969.3/21450 E.E. Collias M.R. Rona D.A. McManus J.S. Creager 1963 Collias, E.E., Rona, M.R., McManus, D.A., and Creager, J.S., 1963, Machine processing of geological data: Department of Oceanography, University of Washington, Technical Report No. 87, 119 p. https://apps.dtic.mil/sti/pdfs/AD0423746.pdf Edythe E. Engleman Larry L. Jackson Daniel R. Norton 1985 Engleman, E.E., Jackson, L.L., and Norton, D.R., 1985, Determination of carbonate carbon in geological materials by coulometric titration: Chemical Geology, v. 53, p. 125-128. https://doi.org/10.1016/0009-2541(85)90025-7 Robert Louis Folk 1974 Folk, R.L., 1974, Petrology of Sedimentary Rocks: Hemphill Publishing Co., Austin, TX, 182 p. https://tamug-ir.tdl.org/handle/1969.3/21435 Robert Louis Folk 1980 Folk, R.L., 1980, Petrology of Sedimentary Rocks: Hemphill Publishing Co., Austin, TX, 184 p. https://repositories.lib.utexas.edu/bitstream/handle/2152/22930/folkpetrology.pdf?sequence=3 Robert Louis Folk 1966 Folk, R. L.,1966, A review of grain-size parameters: Sedimentology, v. 6, p. 73-93. https://doi.org/10.1111/j.1365-3091.1966.tb01572.x Robert Louis Folk William C. Ward 1957 Folk, R.L., and Ward, W.C., 1957, Brazos River bar; a study in the significance of grain size parameters: Journal of Sedimentary Research, v. 27, p. 3-26. https://doi.org/10.1306/74D70646-2B21-11D7-8648000102C1865D Douglas Lamar Inman 1952 Inman, D.L., 1952, Measures for describing the size distribution of sediments: Journal of Sedimentary Research, v. 22, p. 125-145. https://doi.org/10.1306/D42694DB-2B26-11D7-8648000102C1865D J.M. Jaquet J.P. Vernet 1976 Jaquet J. M., and Vernet J.P., 1976, Moment and graphic size parameters in sediments of Lake Geneva (Switzerland): Journal of Sedimentary Petrology, v. 46, p. 305-312. https://doi.org/10.1306/212F6F46-2B24-11D7-8648000102C1865D Penscil Inc. 2015 Penscil Inc., 2015, pcSDSZ: Sediment Size Analysis Software for Windows Operation Manual Version 2.00, prepared for USGS Coastal and Marine Geology. Unpublished document. J. Syvitski 1991 Syvitski, J., 1991, Principles, Methods, and Applications of Particle Size Analysis: Cambridge University Press, New York, USA, 292 p. https://doi.org/10.1017/CBO9780511626142 Parker D. Trask 1930 Trask, P.D., 1930, Mechanical analyses of sediments by centrifuge: Economic Geology, v. 25, p. 581-599. https://doi.org/10.2113/gsecongeo.25.6.581 Parker D. Trask 1932 Trask, P.D., 1932, Origin and environment of source sediments of petroleum: Gulf Publishing Company, Houston, Texas, 323 p. https://www.cambridge.org/core/journals/journal-of-the-marine-biological-association-of-the-united-kingdom/article/abs/origin-and-environment-of-source-sediments-of-petroleum-by-d-trask-parker-assisted-by-harold-e-hammar-and-c-c-wu-gulf-publishing-co-houston-texas-323-pp-1932/E4212BACC9A798808CC166A1DE4CF691#article UIC Inc. 2022 UIC Inc., Operation Manual Model CM5017 CO2 Coulometer, Joliet, IL, 2.0, p. 28-30. UIC Inc. 2022 UIC Inc., Operation Manual Model CM5200 Autosampler Furnace, Joliet, IL, 2.4, 13 p. UIC Inc. 2022 UIC Inc., Operation Manual Model CM5230 Acidification Module, Joliet, IL, 2.1, p. 15-17. Occasional large shells/clams/worms were removed from grab samples when possible to do without disturbing or losing sample. Shell fragments greater than 1 mm were removed prior to grain size analysis. For grain-size analyses, annual service tests and daily calibrations with reference standards ensured that the Beckman Coulter LS 13 320 operated within specifications. Each sample was analyzed three times by the instrument and the data were averaged. In addition, a lab procedural duplicate was run with each batch of samples to ensure consistency and values were within 15 percent. For total carbon and total inorganic carbon analyses, duplicates were run for each sample and the results were averaged. PCMSC ensured that the instrument was within specifications by running blanks and pure, reagent-grade calcium carbonate standard before and after every 10 samples. A lab procedural duplicate was run with each batch of samples to ensure consistency and values were within 15 percent. The duplicate carbon values were within 15 percent. Data values are within the expected values for bay and marsh sediments. Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the metadata record carefully for additional details. Grab samples were taken from a small vessel anchored at the sample location. Subaerial marsh samples (sediment tiles and rip-up clasts) were located with RTK GPS equipment. Manufacturers stated accuracy from the least precise GPS equipment 3-5m. Sample depth is referenced to the surface of the sample or core. Vertical accuracy of 0.25 cm. SEDIMENT COLLECTION. Sediment samples were collected from a small vessel near pre-established USGS instrument moorings using a Gomex box corer that was subsampled with three push cores (37 mm in diameter) per Gomex core when sufficient sample was recovered. At MEV the push cores were collected on foot by pressing the push core directly into the sediment. Six subsamples were collected from the top 5 centimeters (cm) of each push core, a few push cores included longer sections with a maximum of the top 19 cm. The top two subsamples were each 0.5 cm thick, and all following subsamples were each 1 cm thick. Subsamples were placed into pre-weighed Whirl-pak bags. 20220128 SEDIMENT COLLECTION. Additional samples were collected using a variety of grab samplers to collect surface sediment, where a small surficial layer was sampled and processed for grain size. Sediment deposited upon ceramic tiles placed on the marsh top was collected and processed for grain size. Large rip-up clasts deposited on the marsh surface were sampled for bulk density. 20220128 GRAIN-SIZE ANALYSIS: Grain-size analysis was conducted by the USGS Pacific Coastal and Marine Science Center (PCMSC) sediment lab using a Beckman Coulter LS 13 320 particle size analyzer with an aqueous liquid module attachment. PCMSC procedures are modified from those described in Carver (1971) and Folk (1974, 1980). 5-50 grams of sediment was sub-sampled, and at least 10 milliliters of 30 percent hydrogen peroxide were added to oxidize overnight to remove organics. The samples were then heated to 250 degrees Celsius to drive off excess hydrogen peroxide. Next, samples were placed in an ultrasonic bath to help disperse silt and clay (mud) from sand and larger-sized particles. Samples were then rinsed twice in deionized water with centrifugation to remove soluble ions. Subsequently, the samples were wet sieved with 1 millimeter and 0.063 millimeter sieves to segregate the combined gravel and coarse sand fraction (greater than 1 millimeter), sand (1 millimeter to 0.063 millimeter), and mud (less than 0.063 millimeter). Shells > 1 mm were also removed during the sieving process, dried, and weighed. The coarse sand + gravel fractions were then dried, dry sieved at 1/4phi intervals and weighed (Carver, 1971). The sand fraction was dried and weighed. The mud fraction was collected in a 1 liter graduated cylinder, 5 milliliters of at least 10 percent sodium hexametaphosphate (dispersant) were added, and deionized water was added to bring the total the volume to 1 liter. The mud + dispersant solution sat overnight to ensure complete dispersion and to observe if flocculation occurred. Subsequently, a 20 milliliter aliquot was extracted from the graduated cylinder and dried to obtain the mud fraction weight normalized to a 1-liter basis. The mud and sand fractions were analyzed separately via the Beckman Coulter LS 13 320 with the aqueous liquid module attachment. All size fraction data were compiled and converted by the PCMSC sediment lab pcSDSZ program (Penscil, 2015) to a grain-size distribution at 1/4phi size intervals on a weight percent basis. pcSDSZ also calculated interpolated sizes and graphical statistics on a percent coarser basis (Folk and Ward, 1957; Folk, 1966; Folk, 1974, 1980; Inman, 1952; Trask, 1930, 1932) and moment measures (Collias and others, 1963; Jaquet and Vernet, 1976; Folk, 1980). 20220509 Angela Tan USGS Physical Scientist mailing and physical

2885 Mission Street

Santa Cruz CA 95060 831-460-7409 atan@usgs.gov INTERPOLATED SIZES: Grain sizes at select cumulative percentage values (D) were calculated by the PCMSC Sediment Lab software pcSDSZ version 1.71 on a percent coarser basis, which summed from coarse to fine bins. D values were interpolated between phi bins bracketing the specified D value. Grain sizes were converted into units of millimeters (mm) using the formula mm=reciprocal of 2(exponent)phi or (phi=-log2(mm)). Interpolated grain sizes at D5, D10, D16, D25, D50, D75, D84, D90, and D95 are reported in phi and millimeter units. 20220509 The bulk density reported here was calculated with the formula: bulk density = (dry sediment mass + water mass) /((dry sediment mass/sediment density) + (water mass/water density)), where water density is 1 g/cm3 and sediment density is 2.65 g/cm3. Local salinity readings were used to calculate salt mass, which was removed from dry sediment mass prior to this calculation. Measurements were made in the USGS Pacific Coastal and Marine Science Center sediment lab. 20220509 CARBON ANALYSIS: Carbon analysis was performed by the PCMSC carbon lab employing a coulometric titration technique described in Engleman and others (1985) and UIC operating manuals for the UIC CM5200 autosampler furnace, the UIC CM5230 acidification module, and the UIC CM5017 coulometer. Total carbon (TC), total inorganic carbon (TIC), total organic carbon (TOC) and percent calcium carbonate (CaCO3) are reported as percent dry weight. Approximately 5 grams of sediment were dried in an 80 degrees Celsius oven. Samples were then pulverized, redried, and placed in a desiccator. For TC analysis, approximately 20 milligrams of the pulverized sample were weighed and wrapped in an aluminum capsule then combusted at 950 degrees Celsius in an UIC CM5200 autosampler furnace attached to an UIC CM5017 coulometer. The carbon dioxide (CO2) produced by combusting the sample was then converted to TC by the UIC CM5017 coulometer. For TIC, approximately 20 milligrams of sample were weighed and loaded into an UIC CM5230 acidification module attached to an UIC CM5017 coulometer. The samples were then digested in a perchloric acid solution, and the CO2 generated was measured and converted to TIC. Two analyses per sample were run and the results were averaged. TOC was calculated by subtracting TIC from TC. The TIC value was then multiplied by 8.333 (the molar stochiometric ratio of CaCO3 to C) to convert TIC to percent CaCO3. 20230630 Revised data to include two additional measurements, Shell_Subsample_Weight_g and NoShell_Subsample_Weight_g. These weights were obtained as described in the "GRAIN-SIZE ANALYSIS" process step. 20250116 Angela Tan USGS Physical Scientist mailing and physical

2885 Mission Street

Santa Cruz CA 95060 831-460-7409 atan@usgs.gov Data were collected in San Francisco Bay, California Point Point 259 1.0E-5 1.0E-5 Decimal degrees World Geodetic System 1984 (WGS84) WGS84 6378137.0 298.257223563 Attribute Table Table containing attribute information associated with the dataset Producer defined Sample_ID Name of sample producer defined sample identifier Date_Collected Date of sample collection. producer defined 06/04/2021 01/28/2022 mm/dd/yyyy Time_UTC Time of sample collection. producer defined 00:00 23:59 HH:MM Latitude Latitude of collection producer defined 37.58202 37.58646 decimal degrees Longitude Longitude of sample producer defined -122.17052 -122.14129 decimal degrees Core_Depth_cm The midpoint of the depth into the sediment bed of the sample. -999 indicates sample was not from a core and depth not determined. producer defined 0.25 18.50 centimeter Type Type of sample producer defined push core section Sediment core acquired by hand. producer defined grab Sediment grab sample producer defined scraped from deposition tile sediment deposited on ceramic tile on marsh surface producer defined Notes Relevant information regarding the sample during its collection. "NA" indicates that no additional information was noted. producer defined text to describe sample -4.00phi_16mm Weight percent of sample with grain diameter greater than -4.00 phi, or 16 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage -3.75phi_13.5mm Weight percent of sample with grain diameter between -4.00 and -3.75 phi, or 13.5 and 16 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage -3.50phi_11.2mm Weight percent of sample with grain diameter between -3.75 and -3.50 phi, or 11.2 and 13.5 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage -3.25phi_9.51mm Weight percent of sample with grain diameter between -3.50 and -3.25 phi, or 9.51 and 11.2 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage -3.00phi_8mm Weight percent of sample with grain diameter between -3.25 and -3.00 phi, or 8 and 9.51 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage -2.75phi_6.73mm Weight percent of sample with grain diameter between -3.00 and -2.75 phi, or 6.73 and 8 mm, -999indicates that no value was calculated. producer defined 0 100 percentage -2.50phi_5.66mm Weight percent of sample with grain diameter between -2.75 and -2.50 phi, or 5.66 and 6.73 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage -2.25phi_4.76mm Weight percent of sample with grain diameter between -2.50 and -2.25 phi, or 4.76 and 5.66 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage -2.00phi_4mm Weight percent of sample with grain diameter between -2.25 and -2.00 phi, or 4 and 4.76 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage -1.75phi_3.36mm Weight percent of sample with grain diameter between -2.00 and -1.75 phi, or 3.36 and 4 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage -1.50phi_2.83mm Weight percent of sample with grain diameter between -1.75 and -1.50 phi, or 2.83 and 3.36 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage -1.25phi_2.38mm Weight percent of sample with grain diameter between -1.50 and -1.25 phi, or 2.38 and 2.83 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage -1.00phi_2mm Weight percent of sample with grain diameter between -1.25 and -1.00 phi, or 2 and 2.38 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage -0.75phi_1.68mm Weight percent of sample with grain diameter between -1.00 and -0.75 phi, or 1.68 and 2 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage -0.50phi_1.41mm Weight percent of sample with grain diameter between -0.75 and -0.50 phi, or 1.41 and 1.68 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage -0.25phi_1.19mm Weight percent of sample with grain diameter between -0.50 and -0.25 phi, or 1.19 and 1.41 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 0.00phi_1mm Weight percent of sample with grain diameter between -0.25 and 0.00 phi, or 1 and 1.19 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 0.25phi_0.8409mm Weight percent of sample with grain diameter between 0.00 and 0.25 phi, or 0.8409 and 1 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 0.50phi_0.7071mm Weight percent of sample with grain diameter between 0.25 and 0.50 phi, or 0.7071 and 0.8409 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 0.75phi_0.5946mm Weight percent of sample with grain diameter between 0.50 and 0.75 phi, or 0.5946 and 0.7071 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 1.00phi_0.5mm Weight percent of sample with grain diameter between 0.75 and 1.00 phi, or 0.5 and 0.5946 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 1.25phi_0.4204mm Weight percent of sample with grain diameter between 1.00 and 1.25 phi, or 0.4204 and 0.5 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 1.50phi_0.3536mm Weight percent of sample with grain diameter between 1.25 and 1.50 phi, or 0.3536 and 0.4204 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 1.75phi_0.2973mm Weight percent of sample with grain diameter between 1.50 and 1.75 phi, or 0.2973 and 0.3536 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 2.00phi_0.25mm Weight percent of sample with grain diameter between 1.75 and 2.00 phi, or 0.25 and 0.2973 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 2.25phi_0.2102mm Weight percent of sample with grain diameter between 2.00 and 2.25 phi, or 0.2102 and 0.25 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 2.50phi_0.1768mm Weight percent of sample with grain diameter between 2.25 and 2.50 phi, or 0.1768 and 0.2102 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 2.75phi_0.1487mm Weight percent of sample with grain diameter between 2.50 and 2.75 phi, or 0.1487 and 0.1768 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 3.00phi_0.125mm Weight percent of sample with grain diameter between 2.75 and 3.00 phi, or 0.125 and 0.1487 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 3.25phi_0.1051mm Weight percent of sample with grain diameter between 3.00 and 3.25 phi, or 0.1051 and 0.125 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 3.50phi_0.088388mm Weight percent of sample with grain diameter between 3.25 and 3.50 phi, or 0.08839 and 0.1051 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 3.75phi_0.074325mm Weight percent of sample with grain diameter between 3.50 and 3.75 phi, or 0.07433 and 0.08839 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 4.00phi_0.0625mm Weight percent of sample with grain diameter between 3.75 and 4.00 phi, or 0.0625 and 0.07433 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 4.25phi_0.052556mm Weight percent of sample with grain diameter between 4.00 and 4.25 phi, or 0.052556 and 0.0625 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 4.50phi_0.044194mm Weight percent of sample with grain diameter between 4.25 and 4.50 phi, or 0.044194 and 0.052556 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 4.75phi_0.037163mm Weight percent of sample with grain diameter between 4.50 and 4.75 phi, or 0.037163 and 0.044194 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 5.00phi_0.03125mm Weight percent of sample with grain diameter between 4.75 and 5.00 phi, or 0.03125 and 0.037163 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 5.25phi_0.026278mm Weight percent of sample with grain diameter between 5.00 and 5.25 phi, or 0.02628 and 0.03125 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 5.50phi_0.022097mm Weight percent of sample with grain diameter between 5.25 and 5.50 phi, or 0.0221 and 0.02628 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 5.75phi_0.018581mm Weight percent of sample with grain diameter between 5.50 and 5.75 phi, or 0.01858 and 0.0221 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 6.00phi_0.015625mm Weight percent of sample with grain diameter between 5.75 and 6.00 phi, or 0.01563 and 0.01858 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 6.25phi_0.013139mm Weight percent of sample with grain diameter between 6.00 and 6.25 phi, or 0.01314 and 0.01563 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 6.50phi_0.011049mm Weight percent of sample with grain diameter between 6.25 and 6.50 phi, or 0.01105 and 0.01314 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 6.75phi_0.009291mm Weight percent of sample with grain diameter between 6.50 and 6.75 phi, or 0.00929 and 0.01105 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 7.00phi_0.007813mm Weight percent of sample with grain diameter between 6.75 and 7.00 phi, or 0.00781 and 0.00929 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 7.25phi_0.00657mm Weight percent of sample with grain diameter between 7.00 and 7.25 phi, or 0.00657 and 0.00781 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 7.50phi_0.005524mm Weight percent of sample with grain diameter between 7.25 and 7.50 phi, or 0.00552 and 0.00657 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 7.75phi_0.004645mm Weight percent of sample with grain diameter between 7.50 and 7.75 phi, or 0.00465 and 0.00552 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 8.00phi_0.003906mm Weight percent of sample with grain diameter between 7.75 and 8.00 phi, or 0.00391 and 0.00465 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 8.25phi_0.003285mm Weight percent of sample with grain diameter between 8.00 and 8.25 phi, or 0.00329 and 0.00391 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 8.50phi_0.002762mm Weight percent of sample with grain diameter between 8.25 and 8.50 phi, or 0.00276 and 0.00329 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 8.75phi_0.002323mm Weight percent of sample with grain diameter between 8.50 and 8.75 phi, or 0.00232 and 0.00276 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 9.00phi_0.001953mm Weight percent of sample with grain diameter between 8.75 and 9.00 phi, or 0.00195 and 0.00232 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 9.25phi_0.001642mm Weight percent of sample with grain diameter between 9.00 and 9.25 phi, or 0.00164 and 0.00195 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 9.50phi_0.001381mm Weight percent of sample with grain diameter between 9.25 and 9.50 phi, or 0.00138 and 0.00164 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 9.75phi_0.001161mm Weight percent of sample with grain diameter between 9.50 and 9.75 phi, or 0.00116 and 0.00138 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 9.99phi_0.000983mm Weight percent of sample with grain diameter between 9.75 and 9.99 phi, or 0.00098 and 0.00116 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 10.25phi_0.000821mm Weight percent of sample with grain diameter between 9.99 and 10.25 phi, or 0.00082 and 0.00098 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 10.50phi_0.000691mm Weight percent of sample with grain diameter between 10.25 and 10.50 phi, or 0.00069 and 0.00082 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 10.75phi_0.000581mm Weight percent of sample with grain diameter between 10.50 and 10.75 phi, or 0.00058 and 0.00069 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 10.99phi_0.000492mm Weight percent of sample with grain diameter between 10.75 and 10.99 phi, or 0.00049 and 0.00058 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 11.25phi_0.000411mm Weight percent of sample with grain diameter between 10.99 and 11.25 phi, or 0.0004 and 0.00049 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 11.48phi_0.00035mm Weight percent of sample with grain diameter between 11.25 and 11.48 phi, or 0.00035 and 0.0004 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 12.02phi_0.000241mm Weight percent of sample with grain diameter between 11.50 and 12.02 phi, or 0.000241 and 0.00035 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage 13.02phi_0.00012mm Weight percent of sample with grain diameter between 12.02 and 13.02 phi, or 0.00012 and 0.000241 mm, -999 indicates that no value was calculated. producer defined 0 100 percentage Percent_Gravel Percent of sample greater than 2 mm, -999 indicates that no value was calculated. Producer defined 0 100 Percentage Percent_Sand Percent of sample less than 2 mm and greater than 63 microns, -999 indicates that no value was calculated. Producer defined 0 100 Percentage Percent Silt Percent of sample less than 63 microns and greater than 4 microns, -999 indicates that no value was calculated. Producer defined 0 100 Percentage Percent Clay Percent of sample less than 4 microns, -999 indicates that no value was calculated. Producer defined 0 100 Percentage Percent Mud Percent of sample less than 63 microns, -999 indicates that no value was calculated. Producer defined 0 100 Percentage Gravel_to_Sand_ratio ratio of percent sand in sample to percent silt, -999 indicates that no value was calculated. producer defined 0.00 0.01 dimensionless Sand_to_Silt_ratio ratio of percent sand in sample to percent silt, -999 indicates that no value was calculated. producer defined 0.01 219.15 dimensionless Silt_to_Clay_ratio ratio of percent silt in sample to percent clay, -999 indicates that no value was calculated. producer defined 1.17 4.14 dimensionless Sand_to_Clay_ratio ratio of percent sand in sample to percent clay, -999 indicates that no value was calculated. producer defined 0.02 377.49 dimensionless Sand_to_Mud_ratio ratio of percent sand in sample to percent mud, -999 indicates that no value was calculated. producer defined 0.01 138.65 dimensionless D50_percent_coarser_in_phi mm size at D50 in percent coarser, -999 indicates that no value was calculated. Producer defined 1.67 7.79 Phi size D50_percent_coarser_in_mm The grain size in mm at which 50 percent of the distribution is coarser. -999 indicates that no value was calculated. Producer defined 0.00 0.31 millimeters Mean_Phi Mean grain size in phi, -999 indicates that no value was calculated. producer defined 1.47 7.71 Phi size Mean_mm Mean grain size in mm, -999 indicates that no value was calculated. producer defined 0.00 0.36 millimeters Variance Variance, -999 indicates that no value was calculated. producer defined 1.14 11.51 dimensionless Standard_Deviation Standard deviation, -999 indicates that no value was calculated. producer defined 1.07 3.39 Phi size Skewness Skewness, -999 indicates that no value was calculated. producer defined -0.56 3.00 dimensionless Kurtosis Kurtosis, -999 indicates that no value was calculated. producer defined 1.72 18.69 dimensionless Bag_Weight_g The weight of the empty sample bag. -999 indicates that no value was measured. producer defined 3.30 3.41 grams Bag_and_Wet_Sediment_Weight_g The weight of the initial wet sample, as it was collected in the sample bag. -999 indicates that no value was measured. producer defined 10.87 189.00 grams Bag_and_Dry_Sediment_Weight_g The weight of the dry sample including the weight of its sample bag. -999 indicates that no value was measured. producer defined 6.64 133.16 grams Dry_Sediment_Weight_g The weight of the dried sediment in the sample. -999 indicates that no value was measured. producer defined 3.25 129.81 grams Water_Weight_g The weight of the water from the sample. -999 indicates that no value was calculated. producer defined 1.75 73.15 grams Bulk_Density_g/cm^3 The dry bulk density of the sample, calculated as the mass of the dry sediment divided by the volume of the initial sample. -999 indicates that no value was calculated. producer defined 0.63 2.12 grams per cubic centimeter Percent_Total_Carbon total weight percentage of carbon, -999 indicates that no value was calculated. producer defined 0 100 percentage Percent_Total_Organic_Carbon total weight percentage of organic carbon, -999 indicates that no value was calculated. producer defined 0 100 percentage Percent_Total_Inorganic_Carbon total weight percentage of inorganic carbon, -999 indicates that no value was calculated. producer defined 0 100 percentage Percent_Calcium_Carbonate weight percentage of calcium carbonate, -999 indicates that no value was calculated. producer defined 0 100 percentage Shell_Subsample_Weight_g The weight of shells > 1 mm that were sieved from the subsample used for obtaining percent size weights, -999 indicates that no value was calculated. producer defined 0 2.53 grams NoShell_Subsample_Weight_g The weight of the subsample post removing shells > 1 mm, this sample was used for obtaining percent size weights, -999 indicates that no value was calculated. producer defined 0.04 9.83 grams The first line of the csv file is a header line. U.S. Geological Survey U.S. Geological Survey - CMGDS mailing and physical

2885 Mission Street

Santa Cruz CA 95060 831-427-4747 pcmsc_data@usgs.gov Surface-sediment grain-size data are available as a comma-delimited text file (WT_21_grainsize_bulkdensity_carbon.csv), along with associated FGDC-compliant metadata. 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 for Microsoft 365 MSO version 2208 comma-delimited text file No compression applied 0.130 https://doi.org/10.5066/P98BL0XF Data can be downloaded using the Network_Resource_Name link and scrolling down to the Environmental Data section. None 20250321 U.S. Geological Survey, Pacific Coastal and Marine Science Center PCMSC Science Data Coordinator mailing and physical

2885 Mission Street

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