Recent coastal sediments Double Point to Point San Pedro, California

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: D.B. Moore

Publication_Date: 1965

Title:

Recent coastal sediments Double Point to Point San Pedro, California

Geospatial_Data_Presentation_Form: Paper

Series_Information:

Series_Name: Hydraulic Engineering Laboratory Technical Report

Issue_Identification: HEL-2-14

Publication_Information:

Publication_Place: Berkeley, CA

Publisher: University of California

Description:

Abstract:

"This study seeks to examine patterns of long term sediment movement along a portion of the California coast centering around the mouth of San Francisco Bay. Naturally-occurring heavy minerals were used to trace the influence of the several sources of sediments. Surface samples were collected from beaches and from the adjacent portion of the shelf under less than 130 feet of water. The samples obtained were analyzed mechanically and petrographically. Six petrographic provinces were differentiated on the basis of physical and mineralogical properties. It was found that sands south and west of the Golden Gate in less than 60 to 100 feet of water reflect the mineralogy of San Francisco Bay sediment, and samples from the mollusk-rich Bolinas Bay and adjacent areas to the north and west contained large amounts of aragonite. Sediments in 60 to 100 feet of water west of the Golden Gate are unusually high in hornblende and sediments in more than 100 feet of water are somewhat higher in minerals of the Franciscan Formation than sediments closer to the coast. It is concluded from this information that the San Francisco Bay Bar and adjacent sediments south and west of the Golden Gate bridge have been derived principally from San Francisco Bay, and that sediments in the Bolinas Bay area are derived in large part from the decomposition of shells of modern marine organisms. The areas in 60 to 100 feet of water and greater than 100 feet of water do not appear to have any modern sources of sediment and are interpreted as relicts of features developed during lower sands of sea level. Similarities between sediments in more than 100 feet of water in this area and sediments in the same environment to the north of the area studies suggest a less complicate distribution of sediments and perhaps extensive longshore transport of sediments during this lower stand of sea level. The distribution of recent sediments near the coast in the area studies indicates that longshore transport is now only of limited, local importance."

Purpose:

"In the past decade, much interest has been generated in the study of the long term movement of Recent sediments. The present study continues this work, concentrating on the coastal shelf sediments west of Marin and San Francisco Counties, California."

Supplemental_Information:

This work was supported by Contract DA-49-055-CIV-ENG-63-4 with the Coastal Engineering Research Center, Corps of Engineers, U.S. Army. Samples 1683-1745 from Trask's 1954 study (Collected May 1952 to October 1954) Data digitized by the USGS for inclusion into usSEABED (<http://walrus.wr.usgs.gov/usseabed>)

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1964

Currentness_Reference: Publication date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -122.7977

East_Bounding_Coordinate: -122.4654

North_Bounding_Coordinate: 37.9456

South_Bounding_Coordinate: 37.6664

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: University of California at Berkeley

Theme_Keyword: Steel bucket

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: Oceans and Estuaries

Theme_Keyword: Location

Theme_Keyword: GeoscientificInformation

Theme:

Theme_Keyword_Thesaurus:

NASA/Global Change Master Directory (GCMD) Earth Science Keyword. Version 5.3.3

Theme_Keyword: Marine Sediments

Theme_Keyword: Sedimentary Textures

Theme_Keyword: Terrigenous Sediments

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)

Place_Keyword: California

Place_Keyword: Double Point

Place_Keyword: Point San Pedro

Place_Keyword: San Francisco Bay

Place_Keyword: Bolinas Bay

Place_Keyword: Golden Gate Bridge

Access_Constraints: Available at the USGS library and others

Use_Constraints:

Cite D.B. Moore and the University of California, Berkeley as the source of the information

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: University of California

Contact_Address:

Address_Type: Mail

Address: Department of Civil and Environmental Engineering

Address: 760 Davis Hall

City: Berkeley

State_or_Province: CA

Postal_Code: 94720-1710

Contact_Voice_Telephone: 510-642-3261

Browse_Graphic:

Browse_Graphic_File_Name: HEL2-14

Browse_Graphic_File_Description: Sample distribution with bathymetry and coastline for reference

Browse_Graphic_File_Type: .jpg

Data_Set_Credit:

D.B. Moore at the University of California Berkeley for the collection and analysis of data. For inclusion into usSEABED: Digitization: Carolynn Box and Jennifer Mendonca (USGS); Location digitization by Nadine Golden (USGS), Formatting corrections: Jane Reid (USGS) and Chris Jenkins (University of Colorado)

Native_Data_Set_Environment:

Tkme: Another editor for formal metadata by Peter N. Schweitzer (U.S. Geological Survey, Reston, VA 22092), version 2.9.13, Microsoft Windows Version 5.1; Microsoft Word 2000 9.0

Cross_Reference:

Citation_Information:

Originator: P.D. Trask

Publication_Date: 1954

Title: San Francisco Bay sediment study

Geospatial_Data_Presentation_Form: Paper

Series_Information:

Series_Name: University of California Institute of Engineering Research

Issue_Identification: 57, issues 1 and 2

Publication_Information:

Publication_Place: Berkeley, CA

Publisher: University of California

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

No estimate made for the accuracy of the data in the original report. Data digitized by the USGS and partners were visually compared to the source data, and corrected. Where appropriate, data were tested for completeness using MS Excel. Locations checked using GIS.

Logical_Consistency_Report: Data fall within normal ranges for statistical values.

Completeness_Report:

Data from Appendix: statistical data were digitized by hand (typed in), visually compared to source and corrected as needed.. Heavy mineral percents, carbonate percents, and mineral percents not included in usSEABED.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Navigation by radio compass and ship's compass. Locations were digitized from scanned figure using ArcMap 8.3a.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Depth determination by unspecified fathometer. Water depths recorded in feet.

Lineage:

Process_Step:

Process_Description:

Samples were washed to remove clay, salt, and organic matter, and sieved.

Process_Date: Unknown

Source_Produced_Citation_Abbreviation: HEL-2-14

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: University of California

Contact_Address:

Address_Type: Mail

Address: Department of Civil and Environmental Engineering

Address: 760 Davis Hall

City: Berkeley

State_or_Province: CA

Postal_Code: 94720-1710

Contact_Voice_Telephone: 510-642-3261

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Point

Point_and_Vector_Object_Count: 181

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: .0001

Longitude_Resolution: .0001

Geographic_Coordinate_Units: Decimal degrees

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Point

Entity_Type_Definition: SDTS point

Entity_Type_Definition_Source: Source report

Attribute:

Attribute_Label: Depth

Attribute_Definition: Water depth

Attribute_Definition_Source: Source report

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 5.5

Range_Domain_Maximum: 45.7

Attribute_Units_of_Measure: Meters

Attribute_Measurement_Resolution: 0.1

Attribute:

Attribute_Label: Median

Attribute_Definition: Median grainsize

Attribute_Definition_Source: Source report

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -1.32

Range_Domain_Maximum: 3.84

Attribute_Units_of_Measure: Phi

Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Sorting coefficient

Attribute_Definition: Sorting of grainsize

Attribute_Definition_Source: Trask 1932

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1.05

Range_Domain_Maximum: 3.42

Attribute_Units_of_Measure: Phi

Attribute_Measurement_Resolution: 0.01

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: University of California

Contact_Address:

Address_Type: Mail

Address: Department of Civil and Environmental Engineering

Address: 760 Davis Hall

City: Berkeley

State_or_Province: CA

Postal_Code: 94720-1710

Contact_Voice_Telephone: 510-642-3261

Resource_Description: HEL Report 2-14

Distribution_Liability:

Although this dataset has been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data. Users of the data should be aware of limitations of the data due to possible imprecision due to navigational inaccuracies and limitations of the statistical data.

Standard_Order_Process:

Non-digital_Form: Report is available at some libraries.

Fees: None

Technical_Prerequisites: None

Available_Time_Period:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1966

Metadata_Reference_Information:

Metadata_Date: 2005

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey

Contact_Person: Jane A. Reid

Contact_Position: Geologist

Contact_Address:

Address_Type: Physical and mail

Address: 400 Natural Bridges Drive

City: Santa Cruz

State_or_Province: CA

Postal_Code: 95060

Contact_Voice_Telephone: 831-427-4727

Contact_Electronic_Mail_Address: jareid@usgs.gov

Contact_Instructions: email preferred

Metadata_Standard_Name: CSDGM Version 2

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Access_Constraints: None

Metadata_Use_Constraints:

Metadata was written by a user of the data. Any information contained in the physical report is authoritative and supercedes any information given here.