Metadata: Identification_Information: Citation: Citation_Information: Originator: Thomas D. Lorenson Originator: Ray W. Sliter Originator: James E. Conrad Originator: Antoinette G. Papesh Originator: Jonathan A. Warrick Publication_Date: 2021 Title: Core logger data from vibracores collected offshore San Francisco, California, during field activity 2019-649-FA from 2019-10-11 to 2019-10-18 Geospatial_Data_Presentation_Form: comma-delimited text Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9LBG9H5 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/P9LBG9H5 Larger_Work_Citation: Citation_Information: Originator: Ray W. Sliter Originator: James E. Conrad Originator: Thomas D. Lorenson Originator: Antoinette G. Papesh Originator: Alicia F. Balster-Gee Originator: Janet T. Watt Originator: Jonathan A. Warrick Publication_Date: 2021 Title: Geophysical and core sample data collected offshore San Francisco, California, during field activity 2019-649-FA from 2019-10-11 to 2019-10-18 Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9LBG9H5 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/P9LBG9H5 Description: Abstract: This section of the data release contains core logger tabular data of 34 vibracores that were collected aboard the R/V Bold Horizon in 2019 on U.S. Geological Survey Field Activity 2019-649-FA offshore San Francisco, California. The cores were analyzed for gamma ray density and magnetic susceptibility. The logging was performed at 1-cm intervals from the top of each core section. In addition to the core logger data, the locations of the cores are available as either a comma-delimited file or a shapefile. Purpose: Core logger data were used to assess sand and gravel resources in Federal and State waters for potential use in future beach nourishment projects along stretches of the coast where critical erosion hotspots have been identified. This cruise was funded through partnerships with the Bureau of Ocean Energy Management (BOEM) and the State of California Ocean Protection Council (OPC). 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=2019-649-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: 20191011 Ending_Date: 20191018 Currentness_Reference: ground condition at time data were collected Status: Progress: Planned Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -122.87083 East_Bounding_Coordinate: -122.39324 North_Bounding_Coordinate: 38.01347 South_Bounding_Coordinate: 37.49665 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:a81e96a7-db1f-4a00-b5e3-5a2c9fa5e275 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: Material Resources Theme_Keyword: Assessments Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: vibracoring Theme_Keyword: marine geology Theme_Keyword: drilling and coring Theme_Keyword: core analysis Theme_Keyword: sea-floor characteristics Theme: Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords Theme_Keyword: geology Theme_Keyword: geotechnical experiments 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 Francisco Place_Keyword: Bolinas Place_Keyword: Ocean Beach Place: Place_Keyword_Thesaurus: NGA GEOnet Names Server (GNS) Place_Keyword: North Pacific Ocean 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 (USGS, the Bureau of Ocean Energy Management (BOEM), and the California Geological Survey (CGS) 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 Browse_Graphic: Browse_Graphic_File_Name: 2019-649-FA_tracks_and_cores.png Browse_Graphic_File_Description: Map showing locations of vibracore sites (purple dots) and tracklines (blue) along which chirp seismic data were collected. Browse_Graphic_File_Type: PNG Native_Data_Set_Environment: comma separated file Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Identified as best available version Logical_Consistency_Report: Core logger data were collected in the lab from vibracores collected during USGS cruise 2019-649-FA using a Geotek Multi-Sensor Core Logger. The logging was performed at regular intervals. Quality control was conducted during the logging process. 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: Position data were provided by a Hemisphere V100 Global Positioning System using L1, C/A code and carrier phase smoothing with a stated accuracy of 60 centimeters. Lineage: Process_Step: Process_Description: 34 cores were collected on cruise 2019-649-FA with a Rossfelder P-5 vibracorer. Process_Date: 20191018 Process_Step: Process_Description: 36 core logger data files were created for 34 vibracores (cores SF12 and SF18 are in two sections). The core logging was done with a Geotek Multi-Sensor Core Logger running Geotek MSCL software. The logger was equipped for gamma ray density measurements and magnetic susceptibility. The logging was performed at 1-cm intervals from the top of each core section. A 137Cs gamma ray source and gamma detector are mounted on the GeoTek MSCL for measuring bulk density and based on gamma attenuation through core samples. Gamma density was measured on whole cores in a polycarbonate liner at 1 cm intervals. The measurement was calibrated using an aluminum calibration piece mounted inside a water-filled polycarbonate core section. Anomalous values for gamma density were not excluded from the data. A 120 mm diameter Bartington MS2C loop was used to collect magnetic susceptibility data on whole cores. The sensor is electronically calibrated with a supplied stable iron standard. Magnetic susceptibility measurements were collected every 1 cm with 5 second dwell times. The data are shown as uncorrected magnetic susceptibility in 10exp-5 SI dimensionless units. Gamma ray density measurements below 0.1 grams per cubic centimeter or missing data values were the result of poor contact with the core sample or air voids at the logging location. Process_Date: 20191104 Process_Step: Process_Description: Performed minor edits to the metadata to correct typos. No data were changed Process_Date: 20211013 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Susan A. Cochran Contact_Position: Geologist Contact_Address: Address_Type: Mailing and Physical Address: 2885 Mission Street City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Contact_Voice_Telephone: 831-460-7545 Contact_Electronic_Mail_Address: scochran@usgs.gov 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: 36 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: WGS 1984 UTM Zone 11N Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -117.0 Latitude_of_Projection_Origin: 0.0 False_Easting: 500000.0 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.0001 Ordinate_Resolution: 0.0001 Planar_Distance_Units: Meter Geodetic_Model: Horizontal_Datum_Name: D WGS 1984 Ellipsoid_Name: WGS 1984 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257223563 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: Attribute table Entity_Type_Definition: Table containing attribute information associated with the dataset Entity_Type_Definition_Source: Producer defined Attribute: Attribute_Label: Depth cm Attribute_Definition: section depth in centimeters Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 151 Attribute_Units_of_Measure: centimeters Attribute: Attribute_Label: Den1 g/cc Attribute_Definition: gamma ray density, calculated Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -0.1598 Range_Domain_Maximum: 10.53 Attribute_Units_of_Measure: grams per centimeter Attribute: Attribute_Label: MS1 SI x 10^-5 Attribute_Definition: uncorrected magnetic susceptibility in 10exp-5 SI dimensionless units Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 20.815 Range_Domain_Maximum: 609.97 Attribute_Units_of_Measure: dimensionless 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 Pacific Coastal and Marine Science Center 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: 2019-649-FA_core_logs.zip contains core log data for vibracores collected during PCMSC field activity 2019-649-FA. Supplemental files include 2019-649-FA_core_locations.csv and 2019-649-FA_core_locations_shapefile.zip. 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: 20191104 Format_Information_Content: 2019-649-FA_ core_logs.zip contains core logger tabular data per vibracore section. File_Decompression_Technique: Winzip, 7-zip, or Winrar are free software that will open .zip files Transfer_Size: 31.5 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.5066/P9LBG9H5 Access_Instructions: Data can be downloaded using the Network_Resource_Name link, then scroll down to the Sampling Data/Core logger data section. Digital_Form: Digital_Transfer_Information: Format_Name: shapefile Format_Version_Date: 20210514 Format_Information_Content: 2019-649-FA_core_locations_shapefile.zip is a shapefile of vibracore locations File_Decompression_Technique: Winzip, 7-zip, or Winrar are free software that will open .zip files Transfer_Size: 0.003 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.5066/P9LBG9H5 Access_Instructions: Data can be downloaded using the Network_Resource_Name link, then scroll down to the Sampling Data/Core logger data section. Digital_Form: Digital_Transfer_Information: Format_Name: comma-delimited text Format_Version_Date: 20210430 Format_Information_Content: 2019-649-FA_core_locations.csv is a text file containing vibracore locations File_Decompression_Technique: no compression used Transfer_Size: 0.000935 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.5066/P9LBG9H5 Access_Instructions: Data can be downloaded using the Network_Resource_Name link, then scroll down to the Sampling Data/Core logger data section. Fees: None. Technical_Prerequisites: These data can be viewed with any graphics viewing software. Metadata_Reference_Information: Metadata_Date: 20211013 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