Metadata: Identification_Information: Citation: Citation_Information: Originator: George R. Snyder Originator: Alicia F. Balster-Gee Originator: Jared W. Kluesner Originator: Samuel Y. Johnson Originator: Elisa Medri Originator: Alex Simms Originator: Stu Nishenko Originator: H. Gary Greene Originator: James E. Conrad Publication_Date: 20230908 Title: Radiocarbon age data from vibracores collected offshore central California, during field activity 2019-651-FA (ver 2.0, August 2023) Edition: version 2.0 Geospatial_Data_Presentation_Form: CSV format tabular data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9A0U8J7 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/P9A0U8J7 Larger_Work_Citation: Citation_Information: Originator: George R. Snyder Originator: Alicia F. Balster-Gee Originator: Jared W. Kluesner Originator: Samuel Y. Johnson Originator: Elisa Medri Originator: Alex Simms Originator: Stu Nishenko Originator: H. Gary Greene Originator: James E. Conrad Publication_Date: 2022 Title: Geophysical and core sample data collected offshore central California, during field activity 2019-651-FA (ver 2.0, August 2023) Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9A0U8J7 Publication_Information: Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, CA Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P9A0U8J7 Description: Abstract: This dataset includes radiocarbon age data from sediment cores collected offshore central California in the vicinity of Morro Bay. These data were collected aboard the M/V Bold Horizon in October 2019 for use in regional hazard assessments relating to the Hosgri Fault. Purpose: Identification of fault-related submarine hazards is a primary mission of the USGS Coastal and Marine Hazards and Resources Program. The Hosgri Fault is a submarine fault system that likely poses the greatest submarine earthquake threat in the central California region. To gain a better understanding of this fault system, the USGS collected sparker multichannel seismic, CHIRP seismic, and sediment cores to enable a detailed investigation of its geologic history and ongoing activity. These data are intended to further our understanding of geologic hazards near the Hosgri Fault, improve risk assessments for local communities and critical infrastructure, and to provide data for future research on regional tectonic, sedimentary, and geomorphic evolution of coastal California. This work was funded through a Cooperative Research and Development Agreement (CRADA) between the USGS and Pacific Gas and Electric Corporation. Supplemental_Information: Additional information about the field activities from which these data were derived is available online at: https://cmgds.marine.usgs.gov/fan_info.php?fan=2019-651-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: 20191018 Ending_Date: 20191024 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: -121.080024 East_Bounding_Coordinate: -121.043532 North_Bounding_Coordinate: 35.477597 South_Bounding_Coordinate: 35.419749 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:f0734c24-26ed-4bcb-8fd2-8246c5f38364 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: USGS Thesaurus Theme_Keyword: core analysis Theme_Keyword: coastal processes Theme_Keyword: geospatial datasets 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 Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: Pacific Ocean Place_Keyword: State of California Place_Keyword: San Luis Obispo County Place_Keyword: Cayucos Place_Keyword: Cambria Place_Keyword: Estero Bay Place_Keyword: Morro Bay Place: Place_Keyword_Thesaurus: NGA GEOnet Names Server (GNS) Place_Keyword: Diablo Canyon 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: USGS PCMSC Marine Facility personnel Rachel Marcuson, Jenny McKee, Cordell Johnson, and Dan Powers led vibracore collection operations. Cross_Reference: Citation_Information: Originator: Minze Stuiver Originator: Henry A. Polach Publication_Date: 1977 Title: Discussion: Reporting of 14C data Other_Citation_Details: Minze, S., and Polach, H.A., 1977, Discussion: Reporting of 14C data: American Journal of Science, vol. 19, p. 355-363. Online_Linkage: https://doi.org/10.1017/S0033822200003672 Cross_Reference: Citation_Information: Originator: Timothy J. Heaton Originator: Peter Kohler Originator: Martin Butzin Originator: Edouard Bard Originator: Ron W. Reimer Originator: William E.N. Austin Originator: Christopher Bronk Ramsey Originator: Pieter M. Grootes Originator: Lonrad A. Hughen Originator: Bernd Kromer Publication_Date: 2020 Title: Marine20—The marine radiocarbon age calibration curve (0-55,000 cal BP) Other_Citation_Details: Heaton, T.J., Kohler, P., Butzin, M., Bard, E., Reimer, R.W., Austin, W.E.N., Ramsey, C.B., Grootes, P.M., Hughen, L.A., and Kromer, B., 2020, Marine20—The marine radiocarbon age calibration curve (0-55,000 cal BP): Radiocarbon, vol. 62, p. 779-820. Online_Linkage: https://doi.org/10.1017/RDC.2020.68 Cross_Reference: Citation_Information: Originator: Paula J. Reimer Originator: William E.N. Austin Originator: Edouard Bard Originator: Alex Bayliss Originator: Paul G. Blackwell Originator: Christopher Bronk Ramsey Originator: Martin Butzin Originator: Hai Cheng Originator: R. Lawrence Edwards Originator: Michael Friedrich Originator: Pieter M. Grootes Publication_Date: 2020 Title: The IntCal20 Northern Hemisphere radiocarbon age calibration curve (0–55 cal kBP) Other_Citation_Details: Reimer, P.J., Austin, W.E., Bard, E., Bayliss, A., Blackwell, P.G., Ramsey, C.B., Butzin, M., Cheng, H., Edwards, R.L., Friedrich, M., and Grootes, P.M., 2020, The IntCal20 Northern Hemisphere radiocarbon age calibration curve (0–55 cal kBP): Radiocarbon, vol. 62, p.725-757. Online_Linkage: https://doi.org/10.1017/RDC.2020.41 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Quality control of attribute accuracy was conducted during field data collection and processing workflows. 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. Lineage: Process_Step: Process_Description: Cores were collected aboard the M/V Bold Horizon using a Rossfelder P-5 vibracorer during U.S. Geological Survey cruise 2019-651-FA. The cores were transported back to the USGS Pacific Coastal and Marine Science Center core lab for subsequent analyses. Process_Date: 2019 Process_Step: Process_Description: Where suitable material was present in important sediment layers, samples were collected and sent to the U.C. Irvine Keck Carbon Cycle Accelerator Mass Spectrometer facility (KCCAMS) for radiocarbon dating. Data reported in the .csv file follow conventions described in Stuiver and Polach (1977). Process_Date: 20210320 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 Process_Step: Process_Description: Radiocarbon measurements from KCCAMS were used to calculate calibrated ages depending on the sampled material. Ages obtained from shells were calibrated using the Marine20 calibration curve of Heaton and others (2020) and wood fragments were calibrated using the IntCal20 calibration curve of Reimer and others (2020) within the Calib 8.2 program http://calib.org. Process_Date: 2022 Process_Step: Process_Description: Corrected author/Originator spelling in Citation and Larger Work Citation sections of metadata (Media to Medri). No data were changed. (scochran@usgs.gov) Process_Date: 20230104 Process_Step: Process_Description: Added most up to date C14 data for cores 7, 8, and 12 as of August 2023 (grsnyder@usgs.gov). Process_Date: 20230821 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: 40 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: 2019-651-FA_cores_C14.csv Entity_Type_Definition: Comma-delimited text file containing radiocarbon age data for core samples. Entity_Type_Definition_Source: Producer defined Attribute: Attribute_Label: UCIAMS Number Attribute_Definition: University of California Irvine Accelerator Mass Spectrometry Laboratory Number Attribute_Definition_Source: UC Irvine Attribute_Domain_Values: Unrepresentable_Domain: Unique identifier for the sample assigned at UCIAMS Attribute: Attribute_Label: Sample name Attribute_Definition: U.S. Geological Survey assigned sample name given in HF-“core”-“depth”-“material” (for example, HF-1-46-shell is Hosgri Fault core 1 sampled at 46 cm deep with shell material). Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Unique identifier for the sample assigned at USGS Attribute: Attribute_Label: Sampling Depth in Core (cm) Attribute_Definition: Depth of sampling in centimeters as measured from top of core. “VC cutter nose” indicates sediments collected from vibracore cutter nose in the very bottom several centimeters of vibracore during collection. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 16 Range_Domain_Maximum: 296 Attribute_Units_of_Measure: centimeters Attribute: Attribute_Label: fraction modern Attribute_Definition: fraction of modern carbon in sample Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -0.0003 Range_Domain_Maximum: 1.0082 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: Produce defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -0.0006 Range_Domain_Maximum: 0.0016 Attribute_Units_of_Measure: unitless ratio Attribute: Attribute_Label: D14C (per mille) Attribute_Definition: carbon 14 depletion per mille Attribute_Definition_Source: Produce defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -1000.3 Range_Domain_Maximum: 8.2 Attribute_Units_of_Measure: per mille Attribute: Attribute_Label: D14C error (per mille) Attribute_Definition: One standard deviation error of D14C measurement in per mille Attribute_Definition_Source: Produce defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -0.6 Range_Domain_Maximum: 1.6 Attribute_Units_of_Measure: per mille Attribute: Attribute_Label: 14C age (years BP) Attribute_Definition: Carbon 14 age in years before present. “Modern” value indicates sample was modern in age. Values of “>54000” indicate samples that are older than the maximum 14C age of ~54000 years BP that can be measured with radiocarbon. Attribute_Definition_Source: Produce defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1220 Range_Domain_Maximum: 49700 Attribute_Units_of_Measure: years before present Attribute: Attribute_Label: 14C age error (years BP) Attribute_Definition: One standard deviation error of 14C age measurement in per mille. “n.d.” indicates sample had no data for the associated attribute. Attribute_Definition_Source: Produce defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 15 Range_Domain_Maximum: 1600 Attribute_Units_of_Measure: years before present Attribute: Attribute_Label: Calibrated age (Cal years BP) Attribute_Definition: calibrated carbon 14 age in years before present Attribute_Definition_Source: Produce defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 515 Range_Domain_Maximum: 54911 Attribute_Units_of_Measure: calibrated years before present Overview_Description: Entity_and_Attribute_Overview: The first line of the csv file is a header line. Location information for each sediment core can be found in the 2019-651-FA_cores_locations shapefile included in this data release. 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-delimited text file (2019-651-FA_cores_C14.csv) accompanied by CSDGM FGDC compliant metadata. 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: 2022 Format_Information_Content: Comma-delimited text file of radiocarbon age data. Transfer_Size: 0.003 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.5066/P9A0U8J7 Access_Instructions: Data can be downloaded using the Network_Resource_Name link and scrolling to the Environmental 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: 20230908 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