Vibracore CT scans from the San Lorenzo River

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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: Brandon M. Nasr
Originator: SeanPaul La Selle
Originator: William A.L. Chapman
Originator: Noah J. Finnegan
Publication_Date: 20210604
Title: Vibracore CT scans from the San Lorenzo River
Geospatial_Data_Presentation_Form: TIFF
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P9ZT7ZOX

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/P9ZT7ZOX
Online_Linkage: www.sciencebase.gov/catalog/item/6042bf03d34eb1203119db7e

Description:

Abstract:

This data release contains information on computed tomography (CT) images of a vibracore that was collected by the U.S. Geological Survey in 2019. A site next to the San Lorenzo River in Henry Cowell Redwoods State Park, California, was cored to understand the history of recent vertical incision and floodplain abandonment. The core was split into 3 segments after collection. Each segment was scanned using a Geotek Rotating X-ray CT (RXCT) System and CT reconstruction was performed using Geotek reconstruction software. Geotek CT_Quickview software was used to select a representative down-core orthogonal slice from each core segment and the Geotek AddRuler software was used to display core-lengths in each image. The downcore orthogonal slice CT images of each core segment are included as three separate TIFF files. Each TIFF file is accompanied by a software-proprietary XML file that contains the x-ray scanning configuration and settings in addition to dimensional data of the TIFF images.

Purpose:

This dataset was collected to better understand the vertical incision and floodplain abandonment in the San Lorenzo River.

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=2019-673-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:

Single_Date/Time:

Calendar_Date: 20191105

Currentness_Reference: Ground condition at the time the vibracore was collected

Status:

Progress: Complete
Maintenance_and_Update_Frequency: Not planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -122.07063
East_Bounding_Coordinate: -122.07063
North_Bounding_Coordinate: 37.04239
South_Bounding_Coordinate: 37.04239

Keywords:

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation

Theme:

Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: Nonliving resources
Theme_Keyword: Physical/Chemical Features
Theme_Keyword: Physical Habitats and Geomorphology

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: Core Analysis

Theme:

Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: Erosion
Theme_Keyword: Sediment
Theme_Keyword: River

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:

Theme_Keyword_Thesaurus: None
Theme_Keyword: University California Santa Cruz
Theme_Keyword: UCSC

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:6042bf03d34eb1203119db7e

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: San Lorenzo River
Place_Keyword: Henry Cowell Redwoods State Park
Place_Keyword: State of California
Place_Keyword: United States of America

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 and The University of California Santa Cruz 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_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report: No formal attribute accuracy tests were conducted.

Logical_Consistency_Report:

The rulers on the TIFF images denote the length of each core segment, not the depths at which the cores were collected.

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:

The location of the sample was determined using a Garmin eTrex 30x handheld global satellite navigation system (GNSS) receiver capable of receiving wide area augmentation system (WAAS) signals. The manufacturer reported accuracy for horizontal position is 3-5 m while receiving WAAS signals.

Lineage:

Process_Step:

Process_Description:

A vibracore was collected on November 05, 2019. A handheld global satellite navigation system (GNSS) receiver was used to determine the coordinates of the vibracore site. 76.2 mm OD (outer diameter) aluminum irrigation pipe with 1.27 mm wall thickness (inner diameter is 73.66 mm) was driven into the sediment to capture the stratigraphy. A concrete vibrator head attached to the aluminum pipe, which was powered by a Honda GX160~5 HP 4 stroke (modified by Northrock) was used to drive the pipe into the sediment. The pipe was extracted using a winch attached to a steel tripod. Due to difficulty penetrating through dry silt and sand, the borehole was reoccupied twice, resulting in three core segments (A,B,C).

Process_Date: 2019

Process_Step:

Process_Description:

The core segments were brought to the USGS Pacific Coastal and Marine Science Center core facility, where they were split into archive halves and working halves. The working halves' internal structures were imaged with a Geotek Rotating X-Ray CT scanner. Rotational images were acquired every 0.2 degrees at 130 kilovolts (kV) and 210 microamperes, and the rotational images were reconstructed by GeoTek's Reconstructor Software. Once reconstructed, the files were imported into GeoTek's Image Viewer software and a representative downcore slice image was chosen. A ruler was added to the TIFF images using the GeoTek Add Ruler software, which exported the final TIFF and software-proprietary XML files, adding 'R' to the file name. The rulers on the TIFF images denote the length of each core segment, not the depths at which the cores were collected.

Process_Date: 20191107

Process_Step:

Process_Description:

Corrected the URL link to the USGS Field Activity listed in the Supplemental Information section. No data were changed. (scochran@usgs.gov)

Process_Date: 20210610

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: 1

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: NAD83
Ellipsoid_Name: GRS 1980
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222101

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: SL-19-02_R.zip
Entity_Type_Definition:

Zip file contains 3 TIFF files and their respective software-proprietary XML files.

Entity_Type_Definition_Source: Producer defined

Attribute:

Attribute_Label: SL-19-02A_R, SL-19-02B_R, SL-19-02C_R
Attribute_Definition:

CT Core images with the following attributes from the Geotek software-proprietary XML files:

Image-Type= Orthogonal View
Core ID= SL-19-02
Section-number= A (B and C are not listed here)
Physical Width= 9.10
Physical Height= 110.03
Physical Top= 1700.01
Pixels per CM= 104
Horizontal resolution= 104 pixels
Pixel width= 946
Scan Lines= 11473
Detector gear ration= 462:1
Camera Name= Thermo Kevex PSX10-65W
Average= 1
Filename= SL-19-02A_R, SL-19-02B_R, SL-19-02C_R
X-ray Voltage= 130
X-ray Current= 209.8
X-ray spot size= 38
Source object distance= 221.73
Source detector distance= 575.01
Detector CCD mode= 2x2

Filter:
Enabled= False
Window Count= 2
Window= 400
SigmaA= 0.1
SigmaV= 0.0005
Weight= 0.4
Window= 100
SigmaA= 0.1
SigmaV= 0.0005
Weight= 1
Reduction= 0.85

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 946
Range_Domain_Maximum: 11473

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey - ScienceBase

Contact_Address:

Address_Type: mailing and physical
Address: Denver Federal Center, Building 810, Mail Stop 302
City: Denver
State_or_Province: CO
Postal_Code: 80225

Contact_Voice_Telephone: 1-888-275-8747
Contact_Electronic_Mail_Address: sciencebase@usgs.gov

Resource_Description:

These data are available as TIFF images along with their software-proprietary XML files contained in a single zip file (SL-19-02_R.zip) and are accompanied by 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: TIFF
Format_Version_Number: Macintosh Preview
Format_Information_Content:

Zip file contains the TIFF and XML files that are associated with the metadata

File_Decompression_Technique: Use Winzip
Transfer_Size: 37.06

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://www.sciencebase.gov/catalog/file/get/6042bf03d34eb1203119db7e

Network_Resource_Name: https://doi.org/10.5066/P9ZT7ZOX

Access_Instructions:

Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to download the zipped file of data and metadata. The second link points to the landing page for the data release.

Fees: None.

Technical_Prerequisites:

The zip file contains raster data in TIFF format, which can be opened with most graphics and image editing software.

Metadata_Reference_Information:

Metadata_Date: 20210610
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/ScienceBase/DR_P9ZT7ZOX/SL-19-02_R-Metadata.html>