Hope L. Ianiri Amy Gartman Nancy G. Prouty 20250218 comma-delimited text data release DOI:10.5066/P13XVXQC Pacific Coastal and Marine Science Center, Santa Cruz, California U.S. Geological Survey https://doi.org/10.5066/P13XVXQC Hope L. Ianiri Nancy G. Prouty Pamela L. Campbell Amy Gartman Katlin B. Adamczyk Jaycee J. Favela 2025 data release DOI:10.5066/P13XVXQC Pacific Coastal and Marine Science Center, Santa Cruz, CA U.S. Geological Survey Suggested Citation: Ianiri, H.L., Prouty, N.G., Campbell, P.L., Gartman, A., Adamczyk, K.B., and Favela, J.J., 2025, Sedimentary organic geochemistry data from Escanaba Trough, off the coast of northern California, collected May-June 2022: U.S. Geological Survey data release, https://doi.org/10.5066/P13XVXQC. https://doi.org/10.5066/P13XVXQC Sediment grain size was determined on one to five cm subsamples of push cores collected from the Escanaba Trough during May to June 2022. Data were obtained as part of a project to assess organic carbon storage, reactivity, and cycling within sediments of the Escanaba Trough, a hydrothermal spreading center which contains critical minerals. This work aids our understanding of the geochemistry of marine mineral host sediments and hydrothermal vent processes throughout the global ocean. Additional information about the field activity or activities from which these data were derived is available online at: https:// https://cmgds.marine.usgs.gov/fan_info.php?fan=2022-621-FA Escanaba Trough: Exploring the Seafloor and Oceanic Footprints is an interagency effort involving the National Oceanic and Atmospheric Administration, the U.S. Geological Survey, and the Bureau of Ocean Energy Management. Funding is acknowledged from NOAA Ocean Exploration via its Ocean Exploration Fiscal Year 2019 Funding Opportunity and through the National Oceanographic Partnership Program (NOPP), from the USGS Coastal and Marine Hazards and Resources Enhanced Funding Opportunities, and from the Bureau of Ocean Energy Management through Interagency Agreement M19PG00021 with the United States Geological Survey. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. 20220531 20220611 Ground condition at time data were collected. Complete None planned -127.52822333 -127.44709667 41.08224004 40.69572818 ISO 19115 Topic Category environment oceans geoscientificInformation Data Categories for Marine Planning Nonliving resources Mineral resources Physical/Chemical features Substrate USGS Thesaurus push coring grain-size analysis subsampling geochemistry marine geology Marine Realms Information Bank (MRIB) keywords petroleum resources carbon cycle seep and vent ecosystems chemical analysis sediment geochemistry None U.S. Geological Survey USGS Coastal and Marine Hazards and Resources Program CMHRP Pacific Coastal and Marine Science Center PCMSC USGS Metadata Identifier USGS:668f1199d34e4f2ebb7466cb Geographic Names Information System (GNIS) Pacific Ocean NGA GEOnet Names Server (GNS) Escanaba Trough 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 as the originator(s) 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 Angela Tan at the U.S. Geological Survey Pacific Coastal and Marine Science Center measured grain size analysis. Geochemical data are tabulated in comma separated variable (CSV) format. Hope L. Ianiri Pamela L. Campbell Amy Gartman Nancy G. Prouty 2025 Ianiri, H.L., Campbell, P., Gartman, A., and Prouty, N.G., 2025, Characterizing sedimentary organic carbon in a hydrothermal spreading center, the Escanaba Trough: Chemical Geology, https://doi.org/10.1016/j.chemgeo.2025.122679. https://doi.org/10.1016/j.chemgeo.2025.122679 J. L. Morton Robert A. Zierenberg Carol A. Reiss 1994 Morton, J.L., Zierenberg, R.A., Reiss, C.A., 1994. Geologic, hydrothermal, and biologic studies at Escanaba Trough: an introduction, in: Geologic, Hydrothermal, and Biologic Studies at Escanaba Trough, Gorda Ridge, Offshore Northern California. U.S. Geological Survey. David. A. Clague Robert A. Zierenberg Jennifer B. Paduan David W. Caress Brian L. Cousens Brian M. Dreyer Alice S. Davis James McClain Stephanie L. Ross 2022 Clague, D.A., Zierenberg, R.A., Paduan, J.B., Caress, D.W., Cousens, B.L., Dreyer, B.M., Davis, A.S., McClain, J., Ross, S.L., 2022. Emplacement and impacts of lava flows and intrusions on the sediment-buried Escanaba Segment of the Gorda mid-ocean ridge. Journal of Volcanology and Geothermal Research 432, 107701. https://www.sciencedirect.com/science/article/pii/S0377027322002323 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. 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. No formal logical accuracy tests were conducted. Dataset is considered complete for the information presented as described in the abstract. Some samples do not have radiocarbon data because this analysis was only performed on a subset of representative samples. Users are advised to read the rest of the metadata record carefully for additional details. The horizontal accuracy for each sample was obtained from the ROV's Ultra Short Baseline Positioning System (USBL) navigation after calibration to the CASIUS (Calibration of Attitude Sensors In USBL Systems) calibration system. Accuracy for this depth is approximately 10 to 20 m. The vertical accuracy was determined using multiple DVLs (Doppler Velocity Loggers) on the ROV, which are accurate to less than 1 m. SEDIMENT COLLECTION. Samples were collected aboard the R/V Thomas Thompson via push coring using the ROV Jason. Once recovered shipboard, pore waters were extracted via rhizon samplers, cores were subsectioned into one to five cm slices, the exterior sediment which was in contact with the core liner was removed, and remaining sediment was stored frozen in pre-combusted glass jars. 20220611 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). 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). 20240515 Angela Tan USGS Physical Scientist mailing and physical

2885 Mission Street

Santa Cruz CA 95060 831-460-7409 atan@usgs.gov point point 12 0.00000001 0.0000001 Decimal degrees D_WGS_1984 WGS84 6378137.0000 298.2572 EscanabaTrough_grainsize.csv Table of data. producer defined Cruise_ID Lists the alphanumeric cruise identifier for the expedition during which the sample was collected. producer defined TN403 Cruise identification affiliated with Field Activity 2022-621-FA producer defined Sample_ID Name of sample producer defined The sample names include a dive number (J2, denoting Jason2, followed by a number), push core number (PC, denoting push core, followed by a number) and the sediment depth horizon (X-Y). Latitude Latitude of sample in decimal degrees producer defined 40.69572818 41.08224004 decimal degrees 0.00000001 Longitude Longitude of sample in decimal degrees producer defined -127.5282233 -127.4470967 decimal degrees 0.0000001 Water_depth_m Water depth in meters at which the sample was collected. producer defined 3223 3235 meters 1 Location Location where the sample was collected producer defined Central Hill Text descriptor of sampling site as defined in the literature Morton and others (1994), Clague and others (2022) Edifice Rex East Text descriptor of sampling site as defined in the literature Morton and others (1994), Clague and others (2022) SESCA S3A Text descriptor of sampling site as defined in the literature Morton and others (1994), Clague and others (2022) sediment_depth_top_cm top depth of core subsample. Ex: a sediment core slice from 0-1 cm would have a top depth of 0 centimeters and a bottom depth of 1 centimeter. producer defined 0 18 centimeters 1 sediment_depth_bottom_cm bottom depth of core subsample. Ex: a sediment core slice from 0-1 cm would have a top depth of 0 centimeters and a bottom depth of 1 centimeter. producer defined 1 20 centimeters 1 -4.00phi_16mm Weight percent of sample with grain diameter greater than -4.00 phi, or 16 mm 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 producer defined 0 100 percentage 3.50phi_0.088388mm Weight percent of sample with grain diameter between 3.25 and 3.50 phi, or 0.088388 and 0.1051 mm producer defined 0 100 percentage 3.75phi_0.074325mm Weight percent of sample with grain diameter between 3.50 and 3.75 phi, or 0.074325 and 0.088388 mm 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 0.074325 mm 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 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 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 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 producer defined 0 100 percentage 5.25phi_0.026278mm Weight percent of sample with grain diameter between 5.00 and 5.25 phi, or 0.026278 and 0.03125 mm producer defined 0 100 percentage 5.50phi_0.022097mm Weight percent of sample with grain diameter between 5.25 and 5.50 phi, or 0.022097 and 0.026278 mm producer defined 0 100 percentage 5.75phi_0.018581mm Weight percent of sample with grain diameter between 5.50 and 5.75 phi, or 0.018581 and 0.022097 mm producer defined 0 100 percentage 6.00phi_0.015625mm Weight percent of sample with grain diameter between 5.75 and 6.00 phi, or 0.015625 and 0.018581 mm producer defined 0 100 percentage 6.25phi_0.013139mm Weight percent of sample with grain diameter between 6.00 and 6.25 phi, or 0.013139 and 0.015625 mm producer defined 0 100 percentage 6.50phi_0.011049mm Weight percent of sample with grain diameter between 6.25 and 6.50 phi, or 0.011049 and 0.013139 mm producer defined 0 100 percentage 6.75phi_0.009291mm Weight percent of sample with grain diameter between 6.50 and 6.75 phi, or 0.009291 and 0.011049 mm producer defined 0 100 percentage 7.00phi_0.007813mm Weight percent of sample with grain diameter between 6.75 and 7.00 phi, or 0.007813 and 0.009291 mm 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 0.007813 mm producer defined 0 100 percentage 7.50phi_0.005524mm Weight percent of sample with grain diameter between 7.25 and 7.50 phi, or 0.005524 and 0.00657 mm producer defined 0 100 percentage 7.75phi_0.004645mm Weight percent of sample with grain diameter between 7.50 and 7.75 phi, or 0.004645 and 0.005524 mm producer defined 0 100 percentage 8.00phi_0.003906mm Weight percent of sample with grain diameter between 7.75 and 8.00 phi, or 0.003906 and 0.004645 mm producer defined 0 100 percentage 8.25phi_0.003285mm Weight percent of sample with grain diameter between 8.00 and 8.25 phi, or 0.003285 and 0.003906 mm producer defined 0 100 percentage 8.50phi_0.002762mm Weight percent of sample with grain diameter between 8.25 and 8.50 phi, or 0.002762 and 0.003285 mm producer defined 0 100 percentage 8.75phi_0.002323mm Weight percent of sample with grain diameter between 8.50 and 8.75 phi, or 0.002323 and 0.002762 mm producer defined 0 100 percentage 9.00phi_0.001953mm Weight percent of sample with grain diameter between 8.75 and 9.00 phi, or 0.001953 and 0.002323 mm producer defined 0 100 percentage 9.25phi_0.001642mm Weight percent of sample with grain diameter between 9.00 and 9.25 phi, or 0.001642 and 0.001953 mm producer defined 0 100 percentage 9.50phi_0.001381mm Weight percent of sample with grain diameter between 9.25 and 9.50 phi, or 0.001381 and 0.001642 mm producer defined 0 100 percentage 9.75phi_0.001161mm Weight percent of sample with grain diameter between 9.50 and 9.75 phi, or 0.001161 and 0.001381 mm producer defined 0 100 percentage 9.99phi_0.000983mm Weight percent of sample with grain diameter between 9.75 and 9.99 phi, or 0.000983 and 0.001161 mm producer defined 0 100 percentage 10.25phi_0.000821mm Weight percent of sample with grain diameter between 9.99 and 10.25 phi, or 0.000821 and 0.000983 mm producer defined 0 100 percentage 10.50phi_0.000691mm Weight percent of sample with grain diameter between 10.25 and 10.50 phi, or 0.000691 and 0.000821 mm producer defined 0 100 percentage 10.75phi_0.000581mm Weight percent of sample with grain diameter between 10.50 and 10.75 phi, or 0.000581 and 0.000691 mm producer defined 0 100 percentage 10.99phi_0.000492mm Weight percent of sample with grain diameter between 10.75 and 10.99 phi, or 0.000492 and 0.000581 mm producer defined 0 100 percentage 11.25phi_0.000411mm Weight percent of sample with grain diameter between 10.99 and 11.25 phi, or 0.000411 and 0.000492 mm 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 0.000411 mm producer defined 0 100 percentage 12.02phi_0.000241mm Weight percent of sample with grain diameter between 11.48 and 12.02 phi, or 0.000241 and 0.00035 mm 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 producer defined 0 100 percentage Percent_Gravel percent of sample greater than 2 mm producer defined 0 100 percentage Percent_Sand percent of sample less than 2 mm and greater than 63 microns producer defined 0 100 percentage Percent_Silt percent of sample less than 63 microns and greater than 4 microns producer defined 0 100 percentage Percent_Clay percent of sample less than 4 microns producer defined 0 100 percentage Percent_Mud percent of sample less than 63 microns producer defined 0 100 percentage Gravel_to_Sand_ratio ratio of percent gravel in sample to percent sand producer defined 0 4.5 dimensionless Sand_to_Silt_ratio ratio of percent sand in sample to percent silt producer defined 0.01 0.77 dimensionless Silt_to_Clay_ratio ratio of percent silt in sample to percent clay producer defined 0.85 1.97 dimensionless Sand_to_Clay_ratio ratio of percent sand in sample to percent clay producer defined 0.01 1.07 dimensionless Sand_to_Mud_ratio ratio of percent sand in sample to percent mud producer defined 0.01 0.45 dimensionless Gravel_to_Mud_ratio ratio of percent gravel in sample to percent mud producer defined 0 1.59 dimensionless D5_percent_coarser_in_phi Phi size at D5 in percent coarser producer defined -2.93 5.29 Phi size D10_percent_coarser_in_phi Phi size at D10 in percent coarser producer defined -3.33 6.13 Phi size D16_percent_coarser_in_phi Phi size at D16 in percent coarser producer defined -3.27 6.62 Phi size D25_percent_coarser_in_phi Phi size at D25 in percent coarser producer defined -3.19 7.19 Phi size D50_percent_coarser_in_phi Phi size at D50 in percent coarser producer defined -1.19 8.15 Phi size D75_percent_coarser_in_phi Phi size at D75 in percent coarser producer defined 6.53 9.29 Phi size D84_percent_coarser_in_phi Phi size at D84 in percent coarser producer defined 7.93 9.79 Phi size D90_percent_coarser_in_phi Phi size at D90 in percent coarser producer defined 8.94 10.18 Phi size D95_percent_coarser_in_phi Phi size at D95 in percent coarser producer defined 9.9 10.56 Phi size D95_percent_coarser_in_mm mm size at D95 in percent coarser producer defined 0 0 millimeters D90_percent_coarser_in_mm mm size at D90 in percent coarser producer defined 0 0 millimeters D84_percent_coarser_in_mm mm size at D84 in percent coarser producer defined 0 0 millimeters D75_percent_coarser_in_mm mm size at D75 in percent coarser producer defined 0 0.01 millimeters D50_percent_coarser_in_mm mm size at D50 in percent coarser producer defined 0 2.65 millimeters D25_percent_coarser_in_mm mm size at D25 in percent coarser producer defined 0.01 10.02 millimeters D16_percent_coarser_in_mm mm size at D16 in percent coarser producer defined 0.01 10.52 millimeters D10_percent_coarser_in_mm mm size at D10 in percent coarser producer defined 0.01 10.93 millimeters D5_percent_coarser_in_mm mm size at D5 in percent coarser producer defined 0.03 9.67 millimeters Folk_Ward_Median_percent_coarser median for sample by Folk and Ward (1957) method producer defined -1.19 8.15 Phi size Folk_Ward_Mean_percent_coarser mean for sample by Folk and Ward (1957) method producer defined 1.16 8.19 Phi size Folk_Ward_Sorting_percent_coarser sorting for sample by Folk and Ward (1957) method producer defined 1.59 4.74 dimensionless Folk_Ward_Skewness_percent_coarser skewness for sample by Folk and Ward (1957) method producer defined -0.37 0.70 dimensionless Folk_Ward_Kurtosis_percent_coarser kurtosis for sample by Folk and Ward (1957) method producer defined 0.54 1.14 dimensionless Inman_Median_percent_coarser median for sample by Inman (1952) method producer defined -1.19 8.15 Phi size Inman_Mean_percent_coarser mean for sample by Inman (1952) method producer defined 2.33 8.21 Phi size Inman_Sorting_percent_coarser sorting for sample by Inman (1952) method producer defined 1.59 5.60 dimensionless Inman_Skew_16_84_percent_coarser skewness for sample (D16-D84) by Inman (1952) method producer defined -0.36 0.64 dimensionless Inman_Skew_05_95_percent_coarser skewness for sample (D05-D95) by Inman (1952) method producer defined -0.61 0.85 dimensionless Inman_Kurtosis_percent_coarser kurtosis for sample by Inman (1952) method producer defined 0.14 0.66 dimensionless Trask_Median_percent_coarser median for sample by Trask (1930) method producer defined 0 2.65 millimeters Trask_Mean_percent_coarser mean for sample by Trask (1930) method producer defined 0 5.02 millimeters Trask_Sorting_percent_coarser sorting for sample by Trask (1930) method producer defined 2.13 30.45 dimensionless Trask_Skewness_percent_coarser skewness for sample by Trask (1930) method producer defined 0.04 2.80 dimensionless Trask_Kurtosis_percent_coarser kurtosis for sample by Trask (1930) method producer defined 0.04 0.45 dimensionless 1_Moment_Mean_Phi First Moment measure producer defined 1.27 8.13 Phi size 1_Moment_Mean_mm First Moment measure producer defined 0 0.42 millimeters 2_Moment_Variance Second Moment measure producer defined 2.42 25.33 dimensionless 2_Moment_Standard_Deviation Second Moment measure producer defined 1.55 5.03 Phi size 3_Moment_Skewness Third Moment measure producer defined -0.82 0.59 dimensionless 4_Moment_Kurtosis Fourth Moment measure producer defined 1.74 2.82 dimensionless The first line of the csv file is a header line. U.S. Geological Survey U.S. Geological Survey - ScienceBase mailing and physical

Denver Federal Center, Building 810, Mail Stop 302

Denver CO 80225 1-888-275-8747 sciencebase@usgs.gov These data are available in a single csv file (EscanabaTrough_organicgeochemistry_grainsize.csv). 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 Version 2308 Build 16731.20716 Click-to-Run csv file No compression applied 0.08578 https://www.sciencebase.gov/catalog/file/get/668f1199d34e4f2ebb7466cb https://www.sciencebase.gov/catalog/item/668f1199d34e4f2ebb7466cb https://doi.org/10.5066/P13XVXQC Data and metadata can be downloaded using the Network_Resource_Name links. The first link is a direct link to download a zipped file of data and metadata. The second link points to a landing page with metadata and data. The third link points to the landing page for the entire data release. None. These data can be viewed with Microsoft Excel or any text reading software. 20250218 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