Computed tomography (CT) scans of vibracores collected offshore central California, during field activity 2019-651-FA

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Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

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: 20221213
Title:

Computed tomography (CT) scans of vibracores collected offshore central California, during field activity 2019-651-FA

Geospatial_Data_Presentation_Form: JPG format images
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:

Geophysical and core sample data collected offshore central California, during field activity 2019-651-FA

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 computed tomography (CT) scans of 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 activity 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: In work
Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -121.080024
East_Bounding_Coordinate: -121.074185
North_Bounding_Coordinate: 35.477597
South_Bounding_Coordinate: 35.476497

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:ed953fb6-b403-44a8-af60-31b7ff523f62

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

Browse_Graphic:

Browse_Graphic_File_Name: 2019-651-FA_HF05_YZ-inferno.jpg
Browse_Graphic_File_Description: Example image of core CT scan with centimeter scale.
Browse_Graphic_File_Type: JPG

Data_Set_Credit:

USGS PCMSC Marine Facility personnel Rachel Marcuson, Jenny McKee, Cordell Johnson, and Dan Powers led vibracore collection operations.

Native_Data_Set_Environment:

Computed Tomography (CT) scans were obtained with a Geotek RXCT system.

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 on 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. Cores longer than 1.5 m were split into multiple sections to permit scanning in a Geotek RXCT X-ray tomography system. Two representative sections in each core along the XZ and YZ axes were output from the full 3D CT volumes. Images from the CT scanner had ruler scales appended using the Geotek Add Ruler v 1.4 software. Finally, using imagemagick command line tools, multi-section core images were recombined, a contrast stretch and “inferno” color scale were applied, and images were converted to JPG.

Process_Date: 20220826

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

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: 14

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview:

Zip folder of CT scans of sediment cores. Images are in JPG format and include scans for both XZ and YZ directional slices. Naming convention for each core is: 2019-651-FA_cores_CT_HF[CORE#]_[XZ or YZ slice]-inferno.jpg. 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:

Core CT images are provided in a zip archive (2019-651-FA_cores_CT_images.zip) accompanied by CSDGM FGDC compliant metadata. Note that rulers appended to images are provided for scale only and do not necessarily correlate with length measurements in the tabular data provided with this data release (for example the length along a core where a radiocarbon sample was collected). Users are advised to use the rulers as a scale to make length measurements along the core. Full 3D CT scan volumes are available upon request; please contact the PCMSC Data Coordinator about availability.

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: JPG
Format_Version_Number: NA
Format_Information_Content: Zip file contains CT scans of each core in JPG format.
File_Decompression_Technique:

Zip files may be decompressed with any zip utility (for example, 7zip, WinZip, Archive Utility).

Transfer_Size: 73.5

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 Imagery Data section.

Fees: None.

Technical_Prerequisites: Core CT images can be viewed with any standard image software.

Metadata_Reference_Information:

Metadata_Date: 20230104
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

This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/CMGDS_DR_tool/DR_P9A0U8J7/2019-651-FA_cores_CT_images_metadata.html>