210Pb and 137Cs measurements from core 721-1 obtained in 2002 off San Francisquito Creek in South San Francisco Bay

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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: Mary McGann
Originator: Thomas D. Lorenson
Publication_Date: 20230828
Title:

210Pb and 137Cs measurements from core 721-1 obtained in 2002 off San Francisquito Creek in South San Francisco Bay

Geospatial_Data_Presentation_Form: comma-delimited text
Series_Information:

Series_Name: data release
Issue_Identification: DOI: 10.5066/P9QQT6KZ

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/P9QQT6KZ
Online_Linkage:

https://www.sciencebase.gov/catalog/item/644845e5d34ee8d4aded3d37

Larger_Work_Citation:

Citation_Information:

Originator: Mary McGann
Originator: Scott W. Starratt
Originator: Liam M. Reidy
Originator: Thomas D. Lorenson
Originator: R. Lawrence Phillips
Originator: Tara A. Kneeshaw
Publication_Date: 2023
Title:

Radiocarbon measurements, census counts of benthic foraminifera, diatoms, and palynomorphs, and geochemistry from core 721-1 obtained in 2002 off San Francisquito Creek in South San Francisco Bay

Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P9QQT6KZ

Publication_Information:

Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, CA
Publisher: U.S. Geological Survey

Other_Citation_Details:

Suggested Citation: McGann, M., Starratt, S.W., Reidy, L., Lorenson, T.D., Phillips, R.L., and Kneeshaw, T.A., 2023, Radiocarbon measurements, census counts of benthic foraminifera, diatoms, and palynomorphs, and geochemistry from core 721-1 obtained in 2002 off San Francisquito Creek in South San Francisco Bay: U.S. Geological Survey data release, https://doi.org/10.5066/P9QQT6KZ.

Online_Linkage: https://doi.org/10.5066/P9QQT6KZ

Description:

Abstract:

This data release provides 210Pb and 137Cs measurements in sediments of a core obtained off San Francisquito Creek in South San Francisco Bay.

Purpose:

The urbanized area of downtown Menlo Park is subject to persistent flooding and sediment deposition by San Francisquito Creek in South San Francisco Bay. To mitigate these events, a suite of cores was collected in 2002 at the mouth of the creek to determine sediment depositional rates on the delta. One of those cores was selected for microbiological (pollen, diatoms, and foraminifera) and geochemical analyses to reconstruct a depositional record over the past two millennia. Based on an abrupt change in lithology and faunal assemblages, an instantaneous vertical displacement and deepening of the depositional environment is evident. Coseismic subsidence associated with large fault ruptures may cause these events. An age model based on the first appearances of non-indigenous biota, radiocarbon dates, radiochemistry, and sediment geochemistry suggests the 1868 rupture of the Hayward Fault may have been the cause.

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=2002-603-DD 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: 2002
Ending_Date: 2023

Currentness_Reference: Ground condition at time data were collected.

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -122.0961
East_Bounding_Coordinate: -122.0961
North_Bounding_Coordinate: 37.4583
South_Bounding_Coordinate: 37.4583

Keywords:

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: environment
Theme_Keyword: society
Theme_Keyword: geoscientificInformation

Theme:

Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: Substrate

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: chemical analysis
Theme_Keyword: geochemistry
Theme_Keyword: marine chemistry
Theme_Keyword: radiometric dating

Theme:

Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: bay
Theme_Keyword: gravity coring
Theme_Keyword: sediment deposition
Theme_Keyword: sediment geochemistry

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:644845e5d34ee8d4aded3d37

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: San Francisco Bay
Place_Keyword: San Francisquito Creek
Place_Keyword: Hooks Point

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 originators 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: 650-329-4979
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov

Native_Data_Set_Environment: Mac OSX 13.3.1, Microsoft Excel 16.72 for Mac.
Cross_Reference:

Citation_Information:

Originator: P.W. Swarzenski
Originator: M. Baskaran
Originator: R.J. Rosenbauer
Originator: W.H. Orem
Publication_Date: 2006
Title:

Historical trace element distribution in sediments from the Mississippi River Delta.

Other_Citation_Details:

Swarzenski, P.W., Baskaran, M., Rosenbauer, R.J., and Orem, W.H., 2006, Historical trace element distribution in sediments from the Mississippi River Delta: Estuaries and Coasts, v. 29. p. 1094-1107.

Online_Linkage: https://doi.org/10.1007/BF02781812.

Cross_Reference:

Citation_Information:

Originator: P.W. Swarzenski
Publication_Date: 2014
Title: 210Pb dating.
Other_Citation_Details:

Swarzenski, P.W., 2014, 210Pb dating, in Rink, W., Thompson, J., eds., Encyclopedia of Scientific Dating Methods, Springer, Dordrecht, p. 1-11.

Online_Linkage: https://doi.org/10.1007/978-94-007-6326-5.

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Because of the inverse relationship between particle surface area and particle size, the finest sediment available was analyzed. The thinnest possible sediment layers were sampled to provide better time resolution of sedimentation rates. NIST radioactive spikes and material and International Atomic Energy Agency (IAEA) radioactive standards were used for calibrating the counting equipment. Precision in the activities of 210Pb and 226Ra was typically better than 5 percent. Since our spikes are primary standards and our counting equipment was well calibrated, our accuracy was similar to our precision.

Logical_Consistency_Report:

Data were checked for logical consistency by the laboratory staff before release to confirm that numerical values were not outside a reasonable range for a particular field.

Completeness_Report:

Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the metadata for each part of this data release carefully for additional details.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

A formal accuracy assessment of the horizontal positional information in the data set has not been conducted. The horizontal position was estimated based on distances from the modern tidal channel listed on a figure provided to the first author in October 2003. The horizontal accuracy cannot be determined.

Lineage:

Process_Step:

Process_Description:

A metal core barrel, approximately 9 cm in diameter, was driven into the mudflat slightly northwest of Hooks Point on informally named "Hooks Island" in South San Francisco Bay near Palo Alto, California in 2002 to recover a sediment core. The precise coring location is not available. The core was brought to the the USGS facility in Menlo Park, California and housed in a core refrigerator.

Process_Date: 2002

Process_Step:

Process_Description:

Twenty-eight sediment samples from core 721-1 were prepared for 210Pb and 137Cs following the methods of Swarzenski and others (2006) and Swarzenski (2014). Samples weighing 15-20 grams were taken every 2 cm continuously down through 20 cm and then approximately every 5 cm to a depth of 113 cm. Sediment samples for 210Pbc dating were weighed before and after drying at 105 degrees celsius for at least 24 hours, disaggregated in a mortar and pestle, transferred to a plastic test tube, then placed in a gamma radiation detector and counted. Total 210Pb activities were directly determined by measuring the 46.52-KeV gamma peak using ORTEC High Purity Germanium (HPGe) radiation detectors. Supported levels of 210Pb from 226Ra were determined by measuring the gamma activity of 214Pb (at 295 and 352 KeV) and of 214Bi (609 KeV), the short-lived daughter products of 226Ra (351.87 and 609.31 KeV). 137Cs activities in this study were determined by measurement of the 661.6-KeV gamma peak. Precision in these measurements was less than 5 percent.

Process_Date: 2022

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: 28

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.0001
Longitude_Resolution: 0.0001
Geographic_Coordinate_Units: Decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1927
Ellipsoid_Name: Clarke 1866
Semi-major_Axis: 6378206.4
Denominator_of_Flattening_Ratio: 294.978698214

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label:

A comma-separated values file with the first line being a header line.

Entity_Type_Definition:

Results of radiocarbon dating, benthic foraminiferal census counts, diatom census counts, palynomorph census counts, and metal content of fine sediment.

Entity_Type_Definition_Source: Producer defined.

Attribute:

Attribute_Label: Date_Collected
Attribute_Definition: Date in year.
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 2002
Range_Domain_Maximum: 2002

Attribute:

Attribute_Label: Latitude
Attribute_Definition: Latitude of the site at which the push core was collected.
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 37.4583
Range_Domain_Maximum: 37.4583
Attribute_Units_of_Measure: decimal degrees
Attribute_Measurement_Resolution: 0.0001

Attribute:

Attribute_Label: Longitude
Attribute_Definition: Longitude of the site at which the push core was collected.
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -122.0961
Range_Domain_Maximum: -122.0961
Attribute_Units_of_Measure: decimal degrees
Attribute_Measurement_Resolution: 0.0001

Attribute:

Attribute_Label: Sample_Upper_Depth_Limit_cm
Attribute_Definition:

The upper depth at which the sediment sample was obtained below the sediment surface in a core.

Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1
Range_Domain_Maximum: 112
Attribute_Units_of_Measure: centimeters
Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: Sample_Lower_Depth_Limit_cm
Attribute_Definition:

The lower depth at which the sediment sample was obtained below the sediment surface in a core.

Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 2
Range_Domain_Maximum: 113
Attribute_Units_of_Measure: centimeters
Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: Dry_Bulk_Density_per_cubic_g
Attribute_Definition: Measurement of the density of bulk dry sediment per cubic gram.
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1.1277
Range_Domain_Maximum: 1.8385
Attribute_Units_of_Measure: per cubic gram
Attribute_Measurement_Resolution: 0.0001

Attribute:

Attribute_Label: Cumulative_Mass_g_per_square_cm
Attribute_Definition:

Measurement of the cumulative mass of the sediment in grams per square centimeter.

Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1.4554
Range_Domain_Maximum: 40.7576
Attribute_Units_of_Measure: grams per square centimeter
Attribute_Measurement_Resolution: 0.0001

Attribute:

Attribute_Label: Total_210Pb_dpm_per_g
Attribute_Definition:

Measurement of the total 210Pb in disintegrations per minute per gram of sediment.

Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1.2607
Range_Domain_Maximum: 5.4047
Attribute_Units_of_Measure: disintegrations per minute per gram
Attribute_Measurement_Resolution: 0.0001

Attribute:

Attribute_Label: 226Ra_dpm_per_g
Attribute_Definition:

Measurement of 226Ra in disintegrations per minute per gram of sediment.

Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.8284
Range_Domain_Maximum: 1.7553
Attribute_Units_of_Measure: disintegrations per minute per gram
Attribute_Measurement_Resolution: 0.0001

Attribute:

Attribute_Label: 226Ra_Error_dpm_per_g
Attribute_Definition:

Error in the measurement of 226Ra in disintegrations per minute per gram of sediment.

Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.1224
Range_Domain_Maximum: 0.2891
Attribute_Units_of_Measure: disintegrations per minute per gram
Attribute_Measurement_Resolution: 0.0001

Attribute:

Attribute_Label: Excess_210Pb_dpm_per_g
Attribute_Definition:

Measurement of the excess 210Pb in disintegrations per minute per gram of sediment.

Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.1586
Range_Domain_Maximum: 4.1482
Attribute_Units_of_Measure: disintegrations per minute per gram
Attribute_Measurement_Resolution: 0.0001

Attribute:

Attribute_Label: Excess_210Pb_Error_dpm_per_g
Attribute_Definition:

Measurement of the error in the excess 210Pb in disintegrations per minute per gram of sediment.

Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.4972
Range_Domain_Maximum: 1.1223
Attribute_Units_of_Measure: disintegrations per minute per gram
Attribute_Measurement_Resolution: 0.0001

Attribute:

Attribute_Label: 137Cs_dpm_per_g
Attribute_Definition:

Measurement of the 137Cs in disintegrations per minute per gram of sediment.

Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0
Range_Domain_Maximum: 0.5196
Attribute_Units_of_Measure: disintegrations per minute per gram
Attribute_Measurement_Resolution: 0.0001

Attribute:

Attribute_Label: 137Cs_Error_dpm_per_g
Attribute_Definition:

Measurement of the error of 137Cs in disintegrations per minute per gram of sediment. 9999 represents no data.

Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.0166
Range_Domain_Maximum: 0.2079
Attribute_Units_of_Measure: disintegrations per minute per gram
Attribute_Measurement_Resolution: 0.0001

Attribute:

Attribute_Label: Linear_Sedimentation_Rate_cm_per_year
Attribute_Definition:

The linear sedimentation rate in centimeters of sediment per year. 9999 represents no data.

Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.9494
Range_Domain_Maximum: 34.3484
Attribute_Units_of_Measure: centimeters per year
Attribute_Measurement_Resolution: 0.0001

Attribute:

Attribute_Label: Mass_Accumulation_Rate_mg_per_squared_cm_per_year
Attribute_Definition:

The mass accumulation rate in milligrams per squared centimeter of sediment per year.

Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 424.0040
Range_Domain_Maximum: 11110.0597
Attribute_Units_of_Measure: milligrams per squared centimeter per year
Attribute_Measurement_Resolution: 0.0001

Overview_Description:

Entity_and_Attribute_Overview:

The first line of the comma-separated values 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 - 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 in a comma-delimited text file (SFC_210Pb_137Cs_data.csv) which contains results from 210Pb and 137Cs measurements from core 721-1 obtained in 2002 off San Francisquito Creek in South San Francisco Bay.

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_Number: Microsoft Excel 16.72 for Mac
Format_Information_Content: .csv file
File_Decompression_Technique: none
Transfer_Size: 0.00328

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://www.sciencebase.gov/catalog/file/get/644845e5d34ee8d4aded3d37

Network_Resource_Name: https://doi.org/10.5066/P9QQT6KZ

Access_Instructions:

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

Fees: None.

Technical_Prerequisites: These data can be viewed with any text editor software.

Metadata_Reference_Information:

Metadata_Date: 20230828
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_P9QQT6KZ/SFC_210Pb_137Cs_metadata.html>