Gamma-ray bulk density measurements of vibracore JRBP2018-VC01B from Searsville Lake, Jasper Ridge Biological Preserve, Stanford, California

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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: SeanPaul M. La Selle
Originator: M. Allison Stegner
Originator: Brandon M. Nasr
Originator: Elizabeth A. Hadly
Originator: Anthony D. Barnosky
Originator: Brian Sherrod
Publication_Date: 20230131
Title:

Gamma-ray bulk density measurements of vibracore JRBP2018-VC01B from Searsville Lake, Jasper Ridge Biological Preserve, Stanford, California

Geospatial_Data_Presentation_Form: comma-delimited text
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P98CEB1B

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/P98CEB1B
Online_Linkage:

https://www.sciencebase.gov/catalog/item/63912297d34e0de3a1ef8377

Larger_Work_Citation:

Citation_Information:

Computed Tomography (CT) scans, photographs, X-ray Fluorescence (XRF) scans, grain size, and gamma-ray bulk density data of vibracores from Searsville Lake, Jasper Ridge Biological Preserve, Stanford, California

Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P98CEB1B

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/P98CEB1B

Description:

Abstract:

This portion of the data release presents gamma-ray bulk density measurements of vibracore JRBP2018-VC01B collected from Searsville Lake, Jasper Ridge Biological Preserve, Stanford, California in October 2018 (USGS Field Activity 2018-682-FA). The gamma-ray bulk density data are provided in a comma-delimited file (.csv).

Purpose:

Data were obtained to characterize downcore sediment density. These data are intended for science researchers, students, policy makers, and the general public.

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=2018-682-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: 20181029
Ending_Date: 20181029

Currentness_Reference: ground condition

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -122.23787
East_Bounding_Coordinate: -122.23787
North_Bounding_Coordinate: 37.40684
South_Bounding_Coordinate: 37.40684

Keywords:

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation
Theme_Keyword: inlandWaters

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: limnology
Theme_Keyword: geochemistry

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:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:63912297d34e0de3a1ef8377

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Searsville Lake
Place_Keyword: Jasper Ridge
Place_Keyword: Stanford
Place_Keyword: San Mateo County
Place_Keyword: State of California

Access_Constraints: None. Please see 'Distribution Info' for details.
Use_Constraints:

None. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: PCMSC Science Data Coordinator
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: 831-427-474
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Logical_Consistency_Report: No formal logical accuracy tests were conducted
Completeness_Report:

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. Anomalous values for gamma-ray bulk density were not excluded from the data. 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 locations of samples were 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 positions is 3-5 m while receiving WAAS signals.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Core location depths and water depths were not associated with a fixed vertical datum at the time of core collection. No formal positional accuracy tests were conducted, nor were they applicable for this dataset.

Lineage:

Process_Step:

Process_Description:

Core JRBP2018-VC01B was collected on October 29, 2018. A handheld global satellite navigation system (GNSS) receiver was used to determine the locations of sediment sample. The core was segmented into 150 cm (or shorter) sections in the field. Scans of 7 unsplit core segments were obtained on a Geotek Multisensor Core Logger (MSCL) at 1-centimeter downcore intervals using a Cesium-137 gamma-ray source and gamma detector that measure gamma-ray attenuation through the core. The reference core thickness was 7.37 cm. Data are reported at the top of the sampling intervals. Density measurements were calibrated using an aluminum calibration piece mounted inside a water-filled aluminum core liner with an inside with an inside diameter of 7.37 centimeters. Gamma-ray bulk density calibration parameters were A=-0.0002 and B=-0.0577. 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. Anomalous values for gamma-ray bulk density were not excluded from the data.

Process_Date: 20201006
Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: SeanPaul La Selle
Contact_Organization:

U.S. Geological Survey, Pacific Coastal and Marine Science CEnter

Contact_Position: Geologist
Contact_Address:

Address_Type: mailing and physical
Address: 2885 Mission St.
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060

Contact_Voice_Telephone: 831-460-7574
Contact_Electronic_Mail_Address: slaselle@usgs.gov

Process_Step:

Process_Description: corrected typo in doi number (scochran@usgs.gov)
Process_Date: 20230223

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: 946

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: 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: JRBP2018-VC01B-gammadensity.csv
Entity_Type_Definition:

Comma Separated Value (CSV) file containing data. The first row is a header row.

Entity_Type_Definition_Source: Producer Defined

Attribute:

Attribute_Label: core_depth_cm
Attribute_Definition:

Depth of a gamma-ray bulk density measurement (value represents the upper edge of a 1 cm interval). Depths are not corrected for core compaction and represent depth below the lakebed.

Attribute_Definition_Source: Producer Defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 158
Range_Domain_Maximum: 1103
Attribute_Units_of_Measure: cm
Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: section_number
Attribute_Definition:

Core was segmented into seven, approximately 150 cm or shorter sections in order to fit in scanning equipment. The section number denotes which section of core a gamma density measurement is collected from, starting from the top of the original, unsegmented core.

Attribute_Definition_Source: Producer Defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1
Range_Domain_Maximum: 7

Attribute:

Attribute_Label: section_depth_cm
Attribute_Definition: The depth within a core section, starting with 0 cm at the top.
Attribute_Definition_Source: Producer Defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0
Range_Domain_Maximum: 152
Attribute_Units_of_Measure: cm

Attribute:

Attribute_Label: gamma_density_gcc
Attribute_Definition:

The calculated gamma-ray bulk density in grams per cubic centimeter.

Attribute_Definition_Source: Producer Defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.0556
Range_Domain_Maximum: 1.6995

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: GS ScienceBase
Contact_Organization: U.S. Geological Survey

Contact_Address:

Address_Type: mailing address
Address: Denver Federal Center, Building 810, Mail Stop 302
City: Denver
State_or_Province: CO
Postal_Code: 80225
Country: United States

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

Resource_Description:

Gamma-ray bulk density data are available in comma-delimited text file format(JRBP2018-VC01B-gammadensity.csv), including 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 for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: comma-delimited text
Format_Information_Content: comma-delimited text file
File_Decompression_Technique: none
Transfer_Size: 0.016

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://www.sciencebase.gov/catalog/file/get/63912297d34e0de3a1ef8377

Network_Resource_Name:

https://www.sciencebase.gov/catalog/item/63912297d34e0de3a1ef8377

Network_Resource_Name: https://doi.org/10.5066/P98CEB1B

Access_Instructions:

Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to download a zipped file of gamma-ray density data and metadata. The second link points to a landing page where the data and metadata can be downloaded separately. The third link points to the landing page for the entire data release.

Fees: None

Metadata_Reference_Information:

Metadata_Date: 20230223
Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: PCMSC Science Data Coordinator
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: 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_P98CEB1B/JRBP2018-VC01B-gammadensity-metadata.html>