Metadata: Identification_Information: Citation: Citation_Information: Originator: Jenna C. Hill Originator: Nora M. Nieminski Originator: SeanPaul M. La Selle Originator: Janet T. Watt Originator: Daniel S. Brothers Originator: Mary L. McGann Originator: Travis V. Alongi Originator: Gerry A. Hatcher Originator: Brandon M. Nasr Originator: Jennifer A. McKee Originator: Peter Dal Ferro Publication_Date: 20240327 Title: Radiocarbon age data from sediment cores collected offshore southern Cascadia, during field activity 2019-643-FA Geospatial_Data_Presentation_Form: CSV format tabular data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P1E8GDZH 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/P1E8GDZH Larger_Work_Citation: Citation_Information: Originator: Jenna C. Hill Originator: Nora M. Nieminski Originator: SeanPaul M. La Selle Originator: Janet T. Watt Originator: Daniel S. Brothers Originator: Mary L. McGann Originator: Travis V. Alongi Originator: Gerry A. Hatcher Originator: Brandon M. Nasr Originator: Jennifer A. McKee Originator: Peter Dal Ferro Publication_Date: 2024 Title: Sediment core data from offshore southern Cascadia - USGS field activity 2019-643-FA Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P1E8GDZH Publication_Information: Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, CA Publisher: U.S. Geological Survey Other_Citation_Details: Suggested Citation: Hill, J.C., Nieminski, N.M., La Selle, S.M., Watt, J.W., Brothers, D.S., McGann, M.L., Alongi, T.V., Hatcher, G.A., Nasr, B.M., McKee, J.A., and Dal Ferro, P., 2024, Sediment core data from offshore southern Cascadia during field activity 2019-643-FA: U.S. Geological Survey data release, https://doi.org/10.5066/P1E8GDZH. Online_Linkage: https://doi.org/10.5066/P1E8GDZH Description: Abstract: This dataset presents radiocarbon data from 87 samples from sediment cores collected in southern Cascadia (offshore northern California) aboard the M/V Bold Horizon in September-October 2019. Sample ages were determined by the National Ocean Sciences Accelerator Mass Spectrometry (NOSAMS) facility and the W.M. Keck Carbon Cycle Accelerator Mass Spectrometry (KCCAMS) facility at the University of California, Irvine (UCI). Purpose: As part of a multi-year project focused on characterizing offshore marine geohazards (tsunamis, earthquakes, and landslides), the U.S. Geological Survey (USGS) Coastal and Marine Hazards and Resources Program is collaborating with the Bureau of Ocean Energy Management (BOEM) to conduct research offshore northern California. These data were obtained to provide age constraint of various offshore activity in the southern extent of the Cascadia Subduction Zone, which is a major tectonic boundary that is prone to megathrust earthquakes and includes a BOEM offshore wind area of interest. Supplemental_Information: Additional information about the field activity from which these data were derived is available online at: https://cmgds.marine.usgs.gov/fan_info.php?fan=2019-643-FA 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: 20190927 Ending_Date: 20191010 Currentness_Reference: Ground conditions at time data were collected Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -125.25388241 East_Bounding_Coordinate: -124.07787323 North_Bounding_Coordinate: 41.76311745 South_Bounding_Coordinate: 40.76311745 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:957d8656-32f8-443f-b90f-02d065e04418 Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: core analysis Theme_Keyword: ocean processes Theme_Keyword: sediment transport Theme_Keyword: carbon-14 analysis Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: oceans Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: Data Categories for Marine Planning Theme_Keyword: substrate Theme: Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords Theme_Keyword: sediment 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_Keyword: Department of the Interior Theme_Keyword: DOI Theme_Keyword: field activity number 2019-643-FA Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: Pacific Ocean Place_Keyword: State of California Place_Keyword: Humboldt County Place_Keyword: Eureka Access_Constraints: None 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: Radiocarbon analyses were conducted the National Ocean Sciences Accelerator Mass Spectrometry (NOSAMS) facility, Woods Hole, Massachusetts at and the W.M. Keck Carbon Cycle Accelerator Mass Spectrometry (KCCAMS) facility at the University of California, Irvine (UCI). Cross_Reference: Citation_Information: Originator: Dartnell, P. Originator: Conrad, J.E. Originator: Watt, J.T. Originator: Hill, J.C. Publication_Date: 2021 Title: Composite multibeam bathymetry surface and data sources of the southern Cascadia Margin offshore Oregon and northern California Other_Citation_Details: Dartnell, P., Conrad, J.E., Watt, J.T., and Hill, J.C., 2021, Composite multibeam bathymetry surface and data sources of the southern Cascadia Margin offshore Oregon and northern California: U.S. Geological Survey data release, https://doi.org/10.5066/P9C5DBMR Online_Linkage: https://doi.org/10.5066/P9C5DBMR. Cross_Reference: Citation_Information: Originator: Ryan, W.B.F. Originator: Carbotte, S.M. Originator: Coplan, J.O. Originator: O’Hara, A.M. Originator: Melkonian, A. Originator: Arko, R. Originator: Weissel, R.A. Originator: Goodwillie, A. Originator: Nitsche, F. Originator: Bonczkowski, J. Originator: Zemsky, R. Publication_Date: 2009 Title: Global Multi-Resolution Topography synthesis Other_Citation_Details: Originator: Ryan, W.B.F., Carbotte, S.M., Coplan, J.O., O’Hara, A.M., Melkonian, A., Arko, R., Weissel, R.A., Goodwillie, A., Nitsche, F., Bonczkowski, J., Zemsky, R., 2009, Global Multi-Resolution Topography synthesis: Geochemistry, Geophysics, Geosystems, v. 10, n. 3, p. 9, https://doi.org/10.1029/2008GC002332 Online_Linkage: https://doi.org/10.1029/2008GC002332 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: No formal attribute accuracy tests were conducted. Logical_Consistency_Report: No formal logical consistency tests were conducted. Completeness_Report: Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: A Hemisphere V110 GPS system was used for obtaining latitude and longitude point locations during the field activity with a stated accuracy of 0.6 meters (95% confidence). Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Water depth values at core locations were estimated from multibeam bathymetric data (Dartnell and others (2021) or Ryan and others (2009)). Radiocarbon sample depths were measured relative to the top of the uppermost section of each core. No formal vertical accuracy tests were conducted. Lineage: Process_Step: Process_Description: Cores were collected aboard M/V Bold Horizon using a U.S. Geological Survey (USGS) jumbo piston corer (JPC) on cruise 2019-643-FA. The JPC system consisted of a 2500-lb head weight, 3.43-inch diameter barrel, and polybutyrate liner. The JPC trigger arm was set up to collect a trigger core (TC) associated with each JPC (if successful). JPCs were extruded and sectioned (<150 cm) at sea. The cores were then transported back to the USGS Pacific Coastal and Marine Science Center. Process_Date: 2019 Process_Step: Process_Description: Radiocarbon analyses were conducted at the National Ocean Sciences Accelerator Mass Spectrometry (NOSAMS) facility, Woods Hole, Massachusetts for radiocarbon dating. Process_Date: 2020 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: National Ocean Science Accelerator Mass Spectrometry Facility Contact_Organization: Woods Hole Oceanographic Institution Contact_Address: Address_Type: mailing and physical Address: 266 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543 Contact_Voice_Telephone: 508-548-1400 Contact_Electronic_Mail_Address: information@whoi.edu Process_Step: Process_Description: Radiocarbon analyses were conducted at the U.C. Irvine Keck Carbon Cycle Accelerator Mass Spectrometer facility (KCCAMS) for radiocarbon dating. Process_Date: 2022 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Keck Carbon Cycle Accelerator Facility Contact_Organization: University of California, Irvine Contact_Address: Address_Type: mailing and physical Address: 2222B Croul Hall City: Irvine State_or_Province: CA Postal_Code: 92697 Contact_Voice_Telephone: 949-824-3674 Contact_Electronic_Mail_Address: jsouthon@uci.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: 87 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.00001 Longitude_Resolution: 0.00001 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: WGS 1984 Ellipsoid_Name: WGS 84 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257224 Vertical_Coordinate_System_Definition: Depth_System_Definition: Depth_Datum_Name: Local surface Depth_Resolution: 0.1 Depth_Distance_Units: meters Depth_Encoding_Method: Attribute values Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: 2019-643-FA_cores_radiocarbon.csv Entity_Type_Definition: Radiocarbon data obtained through the National Ocean Sciences Accelerator Mass Spectrometry (NOSAMS) facility in Woods Hole, Massachusetts and the University of California, Irvine. Comma-delimited text file also includes sample location, sample depth, and description of the material dated. Entity_Type_Definition_Source: Producer defined Attribute: Attribute_Label: Accession_no Attribute_Definition: The unique accession number is an internal Accelerator Mass Spectrometry laboratory identifier. “OS-“ identifies NOSAMD and “UCI-“ identifies the University of California Irvine Attribute_Definition_Source: NOSAMS and UC Irvine Attribute_Domain_Values: Unrepresentable_Domain: Identifier (OS- or UCI- followed by a unique number) for the sample assigned at each respective facility where analyses were performed Attribute: Attribute_Label: Sample_name Attribute_Definition: U.S. Geological Survey assigned sample name given in “core”-“depth” (for example, JPC04-186–188cm is jumbo piston core 04 sampled at 186–188 cm deep). Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Unrepresentable_Domain: Unique identifier for the sample assigned at USGS Attribute: Attribute_Label: Latitude Attribute_Definition: Latitude of sample in decimal degrees, north Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 40.77668 Range_Domain_Maximum: 41.58120 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: Longitude Attribute_Definition: Longitude of sample in decimal degrees, east Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -124.94707 Range_Domain_Maximum: -124.24902 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: Core_water_depth_m Attribute_Definition: Depth of seafloor at core location Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 60 Range_Domain_Maximum: 1280 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: min_sample_depth_cm Attribute_Definition: Upper depth of interval from which sample was collected from core. Depth is measured in centimeters from the surface (top of the uppermost section of the core). Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 14 Range_Domain_Maximum: 694 Attribute_Units_of_Measure: centimeters Attribute: Attribute_Label: max_sample_depth_cm Attribute_Definition: Lower depth of interval from which sample was collected from core. Depth is measured in centimeters from the surface (top of the uppermost section of the core). Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 16 Range_Domain_Maximum: 697 Attribute_Units_of_Measure: centimeters Attribute: Attribute_Label: Material_dated Attribute_Definition: Description of sample material submitted for radiocarbon dating. Foraminifera were hand-picked from cores by Mary McGann (USGS). Mollusc, plant/wood, and twiglet material was hand-picked from cores by Nora Neiminski (USGS). Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Unrepresentable_Domain: Description of sample Attribute: Attribute_Label: 14C_age_years_BP Attribute_Definition: Conventional radiocarbon age in years before present Attribute_Definition_Source: NOSAMS (Woods Hole, Massachusetts) and University of California, Irvine Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 160 Range_Domain_Maximum: 48000 Attribute_Units_of_Measure: Radiocarbon years before 1950 (14C yr BP) Attribute: Attribute_Label: 14C_age_error_years_BP Attribute_Definition: Radiocarbon age error, 1 sigma. Attribute_Definition_Source: NOSAMS (Woods Hole, Massachusetts) and University of California, Irvine Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 15 Range_Domain_Maximum: 2700 Attribute_Units_of_Measure: Radiocarbon years + or – the calculated age Attribute: Attribute_Label: D13C_per_mille Attribute_Definition: Delta Carbon-13 is a measure of the ratio of stable isotopes C-13:C-12, reported in parts per thousand (per mille, or 0/00). If blank, d13C analyses were not performed. Attribute_Definition_Source: NOSAMS (Woods Hole, Massachusetts) and University of California, Irvine Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -27.89 Range_Domain_Maximum: 7.87 Attribute_Units_of_Measure: parts per thousand (per mille) Attribute: Attribute_Label: Fraction_modern Attribute_Definition: Fraction of modern carbon in sample Attribute_Definition_Source: NOSAMS (Woods Hole, Massachusetts) and University of California, Irvine Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0025 Range_Domain_Maximum: 0.9806 Attribute_Units_of_Measure: unitless ratio Attribute: Attribute_Label: Fraction_modern_error Attribute_Definition: Standard error of measurement in one standard deviation Attribute_Definition_Source: NOSAMS (Woods Hole, Massachusetts) and University of California, Irvine Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0006 Range_Domain_Maximum: 0.0079 Attribute_Units_of_Measure: unitless ratio 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 - CMGDS Contact_Address: Address_Type: mailing and physical Address: 2885 Mission Street City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Contact_Voice_Telephone: 1-831-427-4747 Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov Resource_Description: Radiocarbon age data are provided in a comma separated value (CSV) text file (2019-643-FA_cores_radiocarbon.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_Date: 2023 Format_Information_Content: Comma separate value (csv) text file of radiocarbon age data. File_Decompression_Technique: Zip files may be decompressed with any zip utility (for example, 7zip, WinZip, Archive Utility). Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.5066/P1E8GDZH Access_Instructions: Data can be downloaded using the Network_Resource_Name link and scrolling to 2019-643-FA_cores_radiocarbon.csv in the Sampling Data section. Fees: None. Technical_Prerequisites: Radiocarbon age data in .csv format can be viewed with any standard table editing software (for example, excel, numbers). Metadata_Reference_Information: Metadata_Date: 20240327 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