Metadata: Identification_Information: Citation: Citation_Information: Originator: Hope L. Ianiri Originator: Pamela L. Campbell Originator: Nancy G. Prouty Publication_Date: 20250218 Title: Organic geochemistry data of bulk sediments from the Escanaba Trough, off the coast of Northern California, USA, from May-June 2022. Geospatial_Data_Presentation_Form: comma-delimited text Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P13XVXQC Publication_Information: Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, California Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P13XVXQC Larger_Work_Citation: Citation_Information: Originator: Hope L. Ianiri Originator: Nancy G. Prouty Originator: Pamela L. Campbell Originator: Amy Gartman Originator: Katlin B. Adamczyk Originator: Jaycee J. Favela Publication_Date: 2025 Title: Sedimentary organic geochemistry data from Escanaba Trough, off the coast of northern California, collected May-June 2022. Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P13XVXQC Publication_Information: Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, CA Publisher: U.S. Geological Survey Other_Citation_Details: 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. Online_Linkage: https://doi.org/10.5066/P13XVXQC Description: Abstract: Organic carbon groupings representing different labilities were extracted from sediments collected in the Escanaba Trough from May and June 2022. Organic carbon groups included the total lipid extract and acid insoluble material. These groupings were analyzed for percent total organic carbon (TOC), total nitrogen (TN), stable carbon isotope ratios (d13C), stable nitrogen isotope ratios (d15N) and radiocarbon values (D14C). Percent TOC and TN data was used to calculate the contribution of each organic carbon group to the total organic carbon. Purpose: Data were obtained 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. Supplemental_Information: 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. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20220531 Ending_Date: 20220611 Currentness_Reference: Ground condition at time data were collected. Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -127.53618710 East_Bounding_Coordinate: -127.44714953 North_Bounding_Coordinate: 41.08222461 South_Bounding_Coordinate: 40.69569198 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: environment Theme_Keyword: oceans Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: Data Categories for Marine Planning Theme_Keyword: Nonliving resources Theme_Keyword: Mineral resources Theme_Keyword: Physical/Chemical features Theme_Keyword: Substrate Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: push coring Theme_Keyword: light stable isotope analysis Theme_Keyword: carbon-14 analysis Theme_Keyword: subsampling Theme_Keyword: geochemistry Theme_Keyword: marine geology Theme: Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords Theme_Keyword: petroleum resources Theme_Keyword: carbon cycle Theme_Keyword: seep and vent ecosystems Theme_Keyword: chemical analysis Theme_Keyword: sediment geochemistry Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Coastal and Marine Hazards and Resources Program Theme_Keyword: CMHRP Theme_Keyword: Pacific Coastal and Marine Science Center Theme_Keyword: PCMSC Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:668f0246d34e4f2ebb745682 Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: Pacific Ocean Place: Place_Keyword_Thesaurus: NGA GEOnet Names Server (GNS) Place_Keyword: Escanaba Trough Access_Constraints: No access constraints Use_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. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Pacific Coastal and Marine Science Center Contact_Person: PCMSC Science Data Coordinator Contact_Address: Address_Type: mailing and physical Address: 2885 Mission Street City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Contact_Voice_Telephone: 831-427-4747 Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov Data_Set_Credit: Dyke Andreason at the University of California, Santa Cruz Stable Isotope Laboratory (UCSC SIL) measured ratios of stable isotopes of carbon 13/12 and nitrogen 15/14, total organic carbon, and total nitrogen of the acid insoluble material. Roberta Hansman and Kathy Elder at the National Ocean Sciences Accelerator Mass Spectrometry (NOSAMS) measured ratios of carbon 14/12. Native_Data_Set_Environment: Geochemical data are tabulated in comma separated variable (CSV) format. Cross_Reference: Citation_Information: Originator: Hope L. Ianiri Originator: Pamela L. Campbell Originator: Amy Gartman Originator: Nancy G. Prouty Publication_Date: 2025 Title: Characterizing sedimentary organic carbon in a hydrothermal spreading center, the Escanaba Trough Other_Citation_Details: 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. Online_Linkage: https://doi.org/10.1016/j.chemgeo.2025.122679 Cross_Reference: Citation_Information: Originator: J. L. Morton Originator: Robert A. Zierenberg Originator: Carol A. Reiss Publication_Date: 1994 Title: Geologic, hydrothermal, and biologic studies at Escanaba Trough, Gorda Ridge, offshore northern California Other_Citation_Details: 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. Online_Linkage: Cross_Reference: Citation_Information: Originator: David. A. Clague Originator: Robert A. Zierenberg Originator: Jennifer B. Paduan Originator: David W. Caress Originator: Brian L. Cousens Originator: Brian M. Dreyer Originator: Alice S. Davis Originator: James McClain Originator: Stephanie L. Ross Publication_Date: 2022 Title: Emplacement and impacts of lava flows and intrusions on the sediment-buried Escanaba Segment of the Gorda mid-ocean ridge Other_Citation_Details: 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. Online_Linkage: https://www.sciencedirect.com/science/article/pii/S0377027322002323 Cross_Reference: Citation_Information: Originator: E. G. Bligh Originator: E. J. Dyer Publication_Date: 1959 Title: A rapid method of total lipid extraction and purification Other_Citation_Details: Bligh E. G., Dyer E. J., 1959. A rapid method of total lipid extraction and purification. Canadian Journal of Biochemistry and Physiology, 37 (8). Online_Linkage: https://doi.org/10.1139/o59-099 Cross_Reference: Citation_Information: Originator: U. M. Hanke Originator: L. Wacker Originator: N. Haghipour Originator: M. W. I. Schmidt Originator: T. I. Eglinton Originator: C. P. McIntyre Publication_Date: 2017 Title: Comprehensive radiocarbon analysis of benzene polycarboxylic acids (BPCAs) derived from pyrogenic carbon in environmental samples Other_Citation_Details: Hanke, U.M., Wacker, L., Haghipour, N., Schmidt, M.W.I., Eglinton, T.I., McIntyre, C.P., 2017. Comprehensive radiocarbon analysis of benzene polycarboxylic acids (BPCAs) derived from pyrogenic carbon in environmental samples. Radiocarbon 59, 1103-1116. Online_Linkage: https://doi.org/10.1017/RDC.2017.44 Cross_Reference: Citation_Information: Originator: Jeomshik Hwang Originator: Ellen R. M. Druffel Originator: Tomoko Komada Publication_Date: 2005 Title: Transport of organic carbon from the California coast to the slope region: A study of D14C and d13C signatures of organic compound classes Other_Citation_Details: Hwang, J., Druffel, E.R.M., Komada, T., 2005. Transport of organic carbon from the California coast to the slope region: A study of D14C and d13C signatures of organic compound classes. Glob. Biogeochem. Cycles 19. Online_Linkage: http://doi.wiley.com/10.1029/2004GB002422 Cross_Reference: Citation_Information: Originator: Jeomshik Hwang Originator: Ellen R. M. Druffel Publication_Date: 2005 Title: Blank Correction for D14C Measurements in Organic Compound Classes of Oceanic Particulate Matter Other_Citation_Details: Hwang, J., Druffel, E.R.M., 2005. Blank Correction for D14C Measurements in Organic Compound Classes of Oceanic Particulate Matter. Radiocarbon 47, 75-87. Online_Linkage: https://doi.org/10.1017/S0033822200052218 Cross_Reference: Citation_Information: Originator: Minze Stuvier Originator: Henry A. Polach Publication_Date: 1977 Title: Discussion Reporting of 14C Data Other_Citation_Details: Stuiver, M., Polach, H.A., 1977. Discussion Reporting of 14C Data. Radiocarbon 19, 355-363. Online_Linkage: https://doi.org/10.1017/S0033822200003672 Cross_Reference: Citation_Information: Originator: Xu-Chen Wang Originator: Ellen R. M. Druffel Originator: Cindy Lee Publication_Date: 1996 Title: Radiocarbon in organic compound classes in particulate organic matter and sediment in the deep northeast Pacific Ocean Other_Citation_Details: Wang, X.-C., Druffel, E.R.M., Lee, C., 1996. Radiocarbon in organic compound classes in particulate organic matter and sediment in the deep northeast Pacific Ocean. Geophys. Res. Lett. 23, 3583-3586. Online_Linkage: https://doi.org/10.1029/96GL03423 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Analytical precision of stable isotope ratios relative to internationally calibrated in-house reference materials was less than 0.1 per mil for d13C values and 0.2 per mil for d15N values. Precision of total organic carbon was 2.5 micrograms carbon, which corresponds to less than 0.06 percent based on the amounts analyzed. Precision of total nitrogen was less than 0.5 microgram nitrogen, which corresponds to less than 0.003 percent based on the amounts analyzed. 14C measurements at NOSAMS are checked for accuracy via the primary standard NBS Oxalic Acid I (NIST-SRM-4990). Every group of samples processed includes an appropriate blank, analyzed concurrently. Error in D14C values was less than 1.5 per mil. Logical_Consistency_Report: No formal logical accuracy tests were conducted. Completeness_Report: 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. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: 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- 20 m. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: The vertical accuracy was determined using multiple DVLs (Doppler Velocity Loggers) on the ROV, which are accurate to less than 1 m. Lineage: Process_Step: Process_Description: 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. Process_Date: 20220611 Process_Step: Process_Description: ORGANIC CARBON GROUP ISOLATION: Bulk sediments from two depth horizons in each core (surface and near bottom of core) were subsampled for extraction of lipids, acid-soluble (AS), and acid-insoluble (AI) organic matter (Hwang and others , 2005; Wang and others, 1996). Between 500 and 1500 mg of dried sediment was weighed into pre-combusted glass vials. The total lipid extra was extracted using a modified version of the method presented in Bligh and Dyer (1959). Two bed volumes of hexanes were added to each sample and samples were mixed, sonicated for 15 minutes (min), then centrifuged for five min at 2000 revolutions per min. The supernatant was piped to a combusted Turbovap flask. This process was repeated two more times with hexanes and three times with 9:1 DCM:MeOH, combining the supernatant from each sample. Supernatant was dried under N2 gas at 27 degrees Celsius using a TurboVap Evaporation Concentrator (Zymark Corp, NC, USA) until nearly dry, then were transferred to 4 mL vials. The fully dry total lipid extract (TLE) was weighed for each sample. Remaining sediments were subject to acid hydrolysis by adding 6N HCl to each sample, evacuating the headspace with N2 gas, and heating at 110 degrees Celsius for 20 hours. Samples were then mixed, centrifuged at 2200 rpm for five minutes, and supernatant pipetted off to new vial. This process (mixing, centrifuge, and removal of supernatant) was repeated with 1 mL 6N HCl and four 1 mL rinses of MilliQ H2O. The supernatant from all HCl and MilliQ H2O rinses were combined and stored in the freezer (AS fraction). Additional MilliQ H2O was then added to the residual sediments (AI fraction), mixed, centrifuged, and H2O discarded, until pH of pore fluids was about 4. Sediments were then freeze dried. Process_Date: 20230210 Process_Step: Process_Description: RATIOS OF STABLE ISOTOPES OF CARBON 13/12 (d13C), NITROGEN (d15N), TOTAL ORGANIC CARBON, and TOTAL NITROGEN: Acid insoluble material was analyzed for percent TOC, TN, d13C, and d15N using a CE Instruments NC2500 elemental analyzer (EA) coupled to a Thermo Scientific DELTAplus XP isotope ratio mass spectrometer (IRMS) via a Thermo Scientific Conflo III at the University of California at Santa Cruz Stable Isotope Lab. The total lipid extract was measured for TN and d15N at Texas A&M using a Thermo Scientific GC-Isolink EA coupled to a Thermo Scientific Delta V Advantage IRMS. At both labs, measurements were corrected to VPDB (Vienna PeeDee Belemnite) for d13C and AIR for d15N against in-house standard reference material (PUGel at UCSC, USGS 40 and 41a at Texas A&M). The total lipid extract was measured for d13C at NOSAMS via accelerator mass spectrometry (AMS) using a custom built continuous flow AMS. Process_Date: 20240420 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Dyke Andreason Contact_Organization: Stable Isotope Lab at the University of California at Santa Cruz Contact_Position: Associate Specialist Contact_Address: Address_Type: Mailing Address: 1156 High Street, E&MS Bldg C512 City: Santa Cruz State_or_Province: CA Postal_Code: 95064 Contact_Voice_Telephone: 831-459-5857 Contact_Electronic_Mail_Address: andreasn@ucsc.edu Process_Step: Process_Description: RADIOCARBON ANALYSES: Total lipid extract and acid insoluble material were analyzed for D14C values via accelerator mass spectrometry (AMS) using a custom built continuous flow AMS system at NOSAMS. D14C values were corrected for any addition of carbon during the process step ORGANIC CARBON GROUP ISOLATION by processing 14C modern and depleted grass samples in the same manner as the samples according to Hwang and Druffel (2005) and Hanke and others (2017). Process_Date: 20230420 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Roberta Hansman Contact_Organization: NOSAMS Contact_Position: Research Specialist, Staff Chemist Contact_Address: Address_Type: mailing and physical Address: 266 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543 Contact_Voice_Telephone: 508-289-2332 Contact_Electronic_Mail_Address: nosams@whoi.edu Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: point Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: point Point_and_Vector_Object_Count: 12 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.00000001 Longitude_Resolution: 0.0000001 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: D_WGS_1984 Ellipsoid_Name: WGS84 Semi-major_Axis: 6378137.0000 Denominator_of_Flattening_Ratio: 298.2572 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: EscanabaTrough_organicgeochem_groups.csv Entity_Type_Definition: Table containing organic carbon group data. Entity_Type_Definition_Source: producer defined Attribute: Attribute_Label: Cruise_ID Attribute_Definition: Lists the alphanumeric cruise identifier for the expedition during which the sample was collected. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: TN403 Enumerated_Domain_Value_Definition: Cruise identification affiliated with Field Activity 2022-621-FA Enumerated_Domain_Value_Definition_Source: producer defined Attribute: Attribute_Label: Sample_ID Attribute_Definition: Name of sample Attribute_Definition_Source: producer defined Attribute_Domain_Values: Unrepresentable_Domain: 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). Attribute: Attribute_Label: Latitude Attribute_Definition: Latitude of sample in decimal degrees Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 40.69572818 Range_Domain_Maximum: 41.08224004 Attribute_Units_of_Measure: decimal degrees Attribute_Measurement_Resolution: 0.00000001 Attribute: Attribute_Label: Longitude Attribute_Definition: Longitude of sample in decimal degrees Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -127.5282233 Range_Domain_Maximum: -127.4470967 Attribute_Units_of_Measure: decimal degrees Attribute_Measurement_Resolution: 0.0000001 Attribute: Attribute_Label: Water_depth_m Attribute_Definition: Water depth in meters at which the sample was collected. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3223 Range_Domain_Maximum: 3235 Attribute_Units_of_Measure: meters Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: Location Attribute_Definition: Location where the sample was collected Attribute_Definition_Source: producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Central Hill Enumerated_Domain_Value_Definition: Text descriptor of sampling site as defined in the literature Enumerated_Domain_Value_Definition_Source: Morton and others (1994), Clague and others (2022) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Edifice Rex East Enumerated_Domain_Value_Definition: Text descriptor of sampling site as defined in the literature Enumerated_Domain_Value_Definition_Source: Morton and others (1994), Clague and others (2022) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: SESCA S3A Enumerated_Domain_Value_Definition: Text descriptor of sampling site as defined in the literature Enumerated_Domain_Value_Definition_Source: Morton and others (1994), Clague and others (2022) Attribute: Attribute_Label: sediment_depth_top_cm Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 18 Attribute_Units_of_Measure: centimeters Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: sediment_depth_bottom_cm Attribute_Definition: 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. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 20 Attribute_Units_of_Measure: centimeters Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: d13C_totalLipidExtract Attribute_Definition: ratio of stable carbon 13/12 isotopes of the total lipid extract Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -28.3 Range_Domain_Maximum: -19.0 Attribute_Units_of_Measure: per mil Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: d15N_ totalLipidExtract Attribute_Definition: ratio of stable nitrogen 15/14 isotopes of the total lipid extract Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.9 Range_Domain_Maximum: 5.6 Attribute_Units_of_Measure: per mil Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: D14C_ totalLipidExtract Attribute_Definition: ratio of stable carbon 14/12 isotopes of the total lipid extract. D14C is defined as in Stuiver and Pollach (1977) as the relative difference between the absolute international standard (base year 1950) and sample activity corrected for age and d13C. The value is age corrected to account for decay that took place between collection (or death) of the sample and the time of sample measurement so that measurements of the same sample made years apart will produce the same calculated D14C result. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.9 Range_Domain_Maximum: 5.6 Attribute_Units_of_Measure: per mil Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: D14C_totalLipidExtract_OS_number Attribute_Definition: NOSAMS accession number Attribute_Definition_Source: NOSAMS Attribute_Domain_Values: Unrepresentable_Domain: Identification number assigned by NOSAMS to each radiocarbon measurement made. Attribute: Attribute_Label: TN_totalLipidExtract_percent Attribute_Definition: weight percent of the total lipid extract which is nitrogen. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.22 Range_Domain_Maximum: 3.47 Attribute_Units_of_Measure: percent Attribute_Measurement_Resolution: 0.01 Attribute: Attribute_Label: OC_totalLipidExtract_proportionoftotal Attribute_Definition: proportion of total sedimentary organic carbon which is represented by the lipid extract. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.1 Range_Domain_Maximum: 26.3 Attribute_Units_of_Measure: percent Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: N_totalLipidExtract_proportionoftotal Attribute_Definition: proportion of total sedimentary organic nitrogen which is represented by the lipid extract. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.1 Range_Domain_Maximum: 7.3 Attribute_Units_of_Measure: percent Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: d13C_AcidInsoluble Attribute_Definition: ratio of stable carbon 13/12 isotopes of the acid insoluble material. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -27.9 Range_Domain_Maximum: -24.2 Attribute_Units_of_Measure: per mil Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: d15N_AcidInsoluble Attribute_Definition: ratio of stable nitrogen 15/14 isotopes of the acid insoluble material. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 4.4 Range_Domain_Maximum: 7.0 Attribute_Units_of_Measure: per mil Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: D14C_AcidInsoluble Attribute_Definition: ratio of stable carbon 14/12 isotopes of the acid insoluble material. D14C is defined as in Stuiver and Pollach (1977) as the relative difference between the absolute international standard (base year 1950) and sample activity corrected for age and d13C. The value is age corrected to account for decay that took place between collection (or death) of the sample and the time of sample measurement so that measurements of the same sample made years apart will produce the same calculated D14C result. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -999.1 Range_Domain_Maximum: -388.9 Attribute_Units_of_Measure: per mil Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: D14C_AcidInsoluble_OS_number Attribute_Definition: NOSAMS accession number Attribute_Definition_Source: NOSAMS Attribute_Domain_Values: Unrepresentable_Domain: Identification number assigned by NOSAMS to each radiocarbon measurement made. Attribute: Attribute_Label: TOC_AcidInsoluble_percent Attribute_Definition: weight percent of the acid insoluble material which is organic carbon. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.66 Range_Domain_Maximum: 1.47 Attribute_Units_of_Measure: percent Attribute_Measurement_Resolution: 0.01 Attribute: Attribute_Label: TOC_AcidInsoluble_SD Attribute_Definition: standard deviation of duplicate measurements of the weight percent of the acid insoluble material which is organic carbon. Starting from two separate aliquots of bulk material isolated separately and once measured via elemental analyze isotope mass spectrometry at the UCSC-SIL and once measured via accelerator mass spectrometry at NOSAMS. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.01 Range_Domain_Maximum: 0.46 Attribute_Units_of_Measure: percent Attribute_Measurement_Resolution: 0.01 Attribute: Attribute_Label: TN_AcidInsoluble_percent Attribute_Definition: weight percent of the acid insoluble material which is nitrogen. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.05 Range_Domain_Maximum: 0.13 Attribute_Units_of_Measure: percent Attribute_Measurement_Resolution: 0.01 Attribute: Attribute_Label: OC_AcidInsoluble_proportionoftotal Attribute_Definition: proportion of total sedimentary organic carbon which is represented by acid insoluble material. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 36.7 Range_Domain_Maximum: 127.0 Attribute_Units_of_Measure: percent Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: OC_SD_AcidInsoluble_proportionoftotal Attribute_Definition: standard deviation of duplicate measurements of the proportion of total sedimentary organic carbon which is represented by acid insoluble material. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.8 Range_Domain_Maximum: 40.0 Attribute_Units_of_Measure: percent Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: N_AcidInsoluble_proportionoftotal Attribute_Definition: proportion of total sedimentary organic carbon which is represented by the acid insoluble material. No associated standard deviation is reported as N data was only measured once. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 24.4 Range_Domain_Maximum: 57.0 Attribute_Units_of_Measure: percent Attribute_Measurement_Resolution: 0.1 Attribute: Attribute_Label: OC_AcidSoluble_proportionoftotal Attribute_Definition: proportion of total sedimentary organic carbon which is represented by acid soluble material. Calculated as 100 x proportion_total_OC_AI + proportion_total_OC_TLE. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -48.9 Range_Domain_Maximum: 62.2 Attribute_Units_of_Measure: percent Attribute_Measurement_Resolution: 0.01 Attribute: Attribute_Label: N_AcidSoluble_proportionoftotal Attribute_Definition: proportion of total sedimentary organic carbon which is represented by the acid soluble material. Calculated as 100 x proportion_total_ON_AI + proportion_total_ON_TLE. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 42.3 Range_Domain_Maximum: 75.5 Attribute_Units_of_Measure: percent Attribute_Measurement_Resolution: 0.1 Overview_Description: Entity_and_Attribute_Overview: The first line of the csv file is a header line. Entity_and_Attribute_Detail_Citation: U.S. Geological Survey Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey - ScienceBase Contact_Address: Address_Type: mailing and physical Address: Denver Federal Center, Building 810, Mail Stop 302 City: Denver State_or_Province: CO Postal_Code: 80225 Contact_Voice_Telephone: 1-888-275-8747 Contact_Electronic_Mail_Address: sciencebase@usgs.gov Resource_Description: These data are available in a single csv file (EscanabaTrough_organicgeochem_groups.csv). Distribution_Liability: 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. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: comma-delimited text Format_Version_Number: Microsoft Excel Version 2308 Build 16731.20716 Click-to-Run Format_Information_Content: csv file File_Decompression_Technique: No compression applied Transfer_Size: 0.0400 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/668f0246d34e4f2ebb745682 Network_Resource_Name: https://www.sciencebase.gov/catalog/item/668f0246d34e4f2ebb745682 Network_Resource_Name: https://doi.org/10.5066/P13XVXQC Access_Instructions: 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. Fees: None. Technical_Prerequisites: These data can be viewed with Microsoft Excel or any text reading software. Metadata_Reference_Information: Metadata_Date: 20250218 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Pacific Coastal and Marine Science Center Contact_Person: PCMSC Science Data Coordinator Contact_Address: Address_Type: mailing and physical Address: 2885 Mission Street City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Contact_Voice_Telephone: 831-427-4747 Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998