Census counts of palynomorphs from core 721-1 obtained in 2002 off San Francisquito Creek in South San Francisco Bay

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Mary McGann
Originator: Liam M. Reidy
Publication_Date: 20230828
Title:
Census counts of palynomorphs 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/64484529d34ee8d4aded3d2e
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 census counts of palynomorphs 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: biota
Theme_Keyword: environment
Theme_Keyword: society
Theme_Keyword: geoscientificInformation
Theme:
Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: Habitat
Theme_Keyword: Substrate
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: palynology
Theme:
Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: bay
Theme_Keyword: gravity coring
Theme_Keyword: sediment deposition
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:64484529d34ee8d4aded3d2e
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
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Microscopes are operationally checked every year to assure optics are aligned and visual acuity can be maximized during sorting and identifications. Specimen identifications were compared to reference material (actual specimens and published monographs) to ensure idenfications were accurate. Specimen enumeration (counts) were checked with original laboratory bench sorting sheets to assure numbers were correct, and the sorting and data entry into spreadsheets was rechecked at least once.
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. Cumulative counts of percentage data for total palynomorphs had to equal approximately 100% to ensure numbers were reported correctly.
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-four samples of approximately 1 cubic cm were obtained from core 721-1 for palynomorph analysis every 10 cm downcore starting with the surface of the core down to 160 cm, as well as every 5 cm from 140-80 cm. One tablet containing approximately 13,679 Lycopodium spores was added to each sample for control purposes and to calculate pollen concentration. Samples were sieved with a 125-?m-mesh filter to remove large debris and then processed with the following treatments: 10 percent hydrochloric acid, 10 percent potassium hydroxide, 52 percent hydrofluoric acid, isopropynol wash, 70 percent nitric acid, and an acetolysis solution of nine parts glacial acetic acid to one part concentrated sulfuric acid. The residues were stained with safranin, dehydrated with tertiary butyl alcohol, suspended in silicone oil, and mounted on microscope slides. Palynomorphs were identified and counted on a Zeiss light microscope at 400X magnification. Grains that were characterized yet could not be identified were labeled as "Unknown". Damaged, torn or crumpled grains that were unidentifiable were counted as "Indeterminate". An average of 400 pollen grains and fern spores were counted for 24 samples. Lycopodium spores were counted in order to calculate pollen concentration. Pollen types and fern spores were identified to the lowest taxonomic level possible. Terrestrial pollen percentages were calculated from the sum of terrestrial pollen and fern spores. The pollen slides and residues of this study are on file at the UC Berkeley Geography Department Quaternary Paleoecology Laboratory.
Process_Date: 2003
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: 24
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: Census counts of palynomorphs in 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: 0
Range_Domain_Maximum: 160
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: 1
Range_Domain_Maximum: 161
Attribute_Units_of_Measure: centimeters
Attribute_Measurement_Resolution: 1
Attribute:
Attribute_Label: Percent_abundance_palynomorph_taxa.
Attribute_Definition:
Columns 6 to 23 are percent abundances of each palynomorph taxon in the total palynomorph assemblage and the sum of these columns is approximately 100 percent. The list of palynomorph taxa below includes both the abbreviation and the full taxonomic binomial nomenclature and is presented in the same order as the taxa on the data file.
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value:
List of palynomorph taxa Pinus represents Pinus Quercus represents Quercus Sequoia represents Sequoia Alnus represents Alnus Lithocarpus represents Lithocarpus Acer represents Acer Eucalyptus represents Eucalyptus Juglans represents Juglans Chenopodiaceae represents Chenopodiaceae Cyperaceae represents Cyperaceae Typha_latifolia represents Typha latifolia Linnaeus Poaceae represents Poaceae RRA represents Rhamnceae, Roseceae, and Ancardiaceae Trilete_Spore represents Trilete Spore Monolete_Spore represents Monolete Spore Erodium_cicutarium represents Erodium cicutarium (Linnaeus, 1753) L'Hertier ex. Aiton, 1789 Plantago_lanceolata represents Plantago lanceolata Linnaeus Cruciferae represents Cruciferae
Enumerated_Domain_Value_Definition: percent abundance ranging from 0-100
Enumerated_Domain_Value_Definition_Source: Producer defined
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_palynomorphs_data.csv) which contains results from census counts of palynomorphs 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: 0.0246
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
https://www.sciencebase.gov/catalog/file/get/64484529d34ee8d4aded3d2e
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_palynomorphs_metadata.html>
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