Photographs of sediment cores collected offshore southern Cascadia, during field activity 2019-643-FA

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Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

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:

Photographs of sediment cores collected offshore southern Cascadia, during field activity 2019-643-FA

Geospatial_Data_Presentation_Form: TIFF format images
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:

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 includes photographs (linescan images) of sediment cores collected in southern Cascadia (offshore northern California) aboard the MV Bold Horizon in September-October 2019.

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. This region marks 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. To gain a better understanding of the geologic hazards of the region, 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, the USGS collected sediment cores to enable a detailed investigation of southern Cascadia's geologic history and ongoing activity.

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:ea610cb2-c22b-4bc3-9fed-01cee3531481

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: core analysis
Theme_Keyword: ocean processes
Theme_Keyword: sediment transport
Theme_Keyword: geospatial datasets

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

Browse_Graphic:

Browse_Graphic_File_Name: JPC30_photo_preview.jpg
Browse_Graphic_File_Description: Example linescan image of a section of core JPC-30.
Browse_Graphic_File_Type: JPG

Native_Data_Set_Environment:

Linescan photographs were obtained with a Geotek Linescan V camera 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.

Positional_Accuracy:

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Core depth values are relative to the top of sediment in the uppermost core section. Coring-induced compaction, if any, was not determined. No formal vertical accuracy tests were conducted.

Lineage:

Process_Step:

Process_Description:

Cores were collected aboard MV 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). Gravity cores (GC) were collected with the same JPC system in two localities. JPCs and GCs 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:

Cores were segmented into 150 cm (or shorter) sections and split into "working" and "archive" halves in the USGS Pacific Coastal and Marine Science Center core lab. Sediment surfaces were cleaned and smoothed on the "working" halves of split cores. A Geotek V Linescan Imaging system mounted to a Geotek Multisensor Core Logger (MSCL) was used to automate continuous downcore photography. A prime lens with a 50 mm focal length was mounted 38.6 cm above the core surface. Cross polarized light emitting diodes (LED) were used to illuminate the sediment surface. Colors were calibrated in the Geotek Linescan software using an 18 percent gray card and images were acquired at an aperture of f4.07 and exposure time of 40 milliseconds. Each image file corresponds to an individual color photograph of a core segment in 16-bit RGB TIFF format, along with proprietary metadata files containing image scaling information. File names correspond to the names of each core segment. For example '2019_643_FA_GC19_02.tif' corresponds to the second segment of the gravity core 'GC19'. A list of linescan core photo TIFF images is included in this data release in the 2019-643-FA_cores.csv file.

Process_Date: 2020

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: 142

Spatial_Reference_Information:

Vertical_Coordinate_System_Definition:

Depth_System_Definition:

Depth_Datum_Name: Local surface
Depth_Resolution: 0.1
Depth_Distance_Units: centimeters
Depth_Encoding_Method: Attribute values

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: 2019-643-FA_core_photos.zip
Entity_Type_Definition:

A zip file containing 142 16-bit RGB TIFF files of core photographs and their respective software-proprietary XML files.

Entity_Type_Definition_Source: Producer defined

Attribute:

Attribute_Label: Linescan metadata XML files
Attribute_Definition:

These Geotek software-proprietary XML files contain information on linescan acquisition settings and image scaling information. Each linescan TIFF file is accompanied by an XML file with the same filename. The following attributes and example attribute values are provided from 2019_643_FA_GC19_02.xml <geotek-image> <image-type>giRulerImage</image-type> <coreID>2019_643_FA_GC19</coreID> <section-number>02</section-number> <image-number>1</image-number> <physical-width>9.25</physical-width> <physical-height>151.40</physical-height> <physical-top>70.10</physical-top> <pixels-per-scan>5</pixels-per-scan> <pixels-per-CM>200</pixels-per-CM> <horizontal-resolution>200</horizontal-resolution> <exposure-time-ms>40</exposure-time-ms> <calibration-aperture>4.44</calibration-aperture> <image-aperture>4.07</image-aperture> <red-high-calibration>18.0</red-high-calibration> <green-high-calibration>18.0</green-high-calibration> <blue-high-calibration>18.0</blue-high-calibration> <red-low-calibration>0.0</red-low-calibration> <green-low-calibration>0.0</green-low-calibration> <blue-low-calibration>0.0</blue-low-calibration> <pixel-width>1850</pixel-width> <scan-lines>30280</scan-lines> <filename>2019_643_FA_GC19_02.tif</filename> <geotek-camera-lighting version="2" mode="visible" bank2cluster1="0" bank2cluster2="0" bank2cluster3="0" bank2cluster4="0" bank1cluster1="0" bank1cluster2="0" bank1cluster3="0" bank1cluster4="0" /> <convg-x-red>0</convg-x-red> <convg-x-green>0</convg-x-green> <convg-x-blue>0</convg-x-blue> <convg-y-red>0</convg-y-red> <convg-y-green>4</convg-y-green> <convg-y-blue>8</convg-y-blue> </geotek-image>

Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Unrepresentable_Domain:

Geotek software-proprietary XML files contain information on linescan acquisition settings and image scaling information. The values in the example provided may be different for each scan. Please contact the PCMSC data coordinator for more information on the contents of these XML files.

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 photographs are provided in a zip archive (2019-643-FA_cores_photos.zip) with CSDGM FGDC compliant metadata. 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: TIF, XML
Format_Information_Content:

Zip file contains core photographs in TIFF format and associated proprietary metadata in XML format.

File_Decompression_Technique:

Zip file may be decompressed with any zip utility (e.g., 7zip, WinZip, Archive Utility).

Transfer_Size: 34078

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_photos.zip in the Imagery Data section.

Fees: None.

Technical_Prerequisites:

Linescan images can be viewed with any standard image software. Proprietary metadata XML files can be viewed with any standard text editing software.

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

This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/CMGDS_DR_tool/DR_P1E8GDZH/2019-643-FA_cores_photos_metadata.html>