Sand movement along a portion of the northern California coast

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: U.S. Army

Originator: Coastal Engineering Research Center

Originator: John Cherry

Publication_Date: 1965

Title: Sand movement along a portion of the northern California coast

Geospatial_Data_Presentation_Form: Paper

Publication_Information:

Publication_Place: Monterey, CA

Publisher: United States Naval Postgraduate School

Description:

Abstract:

"The long-term beach and offshore sand movement along the portion of the northern California coast between Drakes Bay and the Russian River has been studied. Analysis of hindcast swell data, availability of sand for transport, refraction diagrams and knowledge of stable shapes of sedimentary coastlines suggested that under present conditions little net longshore movement of sand occurs in the area and that the beaches are generally in equilibrium with negligible supply or loss of sand. Surface sediment samples were collected from beaches and offshore zones. Twelve sedimentary petrologic provinces were outlined on the basis of the patterns of heavy mineral distribution. Sands of the provinces nearest the dioritic cliffs of the headlands, Point Reyes, Tomales Point and Bodega Head, have been derived from these cliffs by erosion during the present sedimentation period. The dioritic debris have been supplied from the cliffs at an imperceptibly slow, yet geologically significant, rate. The heavy mineral compositions of the headland are distinctly different from the dioritic sands near the headlands. The mineralogical evidence confirms the results of initial analysis, and shows that negligible quantities of sand move southward around the headlands. In effect the headlands Point Reyes and Bodega Head are barriers to longshore transport. West of Point Reyes Beach the grain size and heavy mineral patterns of distribution indicate that the sands beyond 90 feet are relatively inactive. These sands are probably relic deposits of an ancient period of sand transportation and deposition. The sands of several of the active nearshore provinces apparently were derived and originally made available for coastal transport during ancient sedimentation periods. These active sands now exist in a relatively stable distribution. The dilution rate as a result of present supply is negligible."

Purpose:

"The primary objective of this investigation was to determine the patterns of net or long-term littoral and offshore sand movement along the portion of the northern California coast indicated in Figure 1" (just north of the Russian River to an point between Pt. Reyes and Bolinas Bay)

Supplemental_Information:

Data digitized for inclusion into usSEABED. (<http://walrus.wr.usgs.gov/usseabed>)

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1963

Currentness_Reference: Publication date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -121.193

East_Bounding_Coordinate: -122.78451

North_Bounding_Coordinate: 38.4634

South_Bounding_Coordinate: 37.9565

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: U.S. Army Corps of Engineers

Theme_Keyword: Coastal Engineering Research Center

Theme_Keyword: CERC

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: Sediment Composition

Theme_Keyword: Sedimentary Textures

Theme_Keyword: Terrigenous Sediments

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)

Place_Keyword: California

Place_Keyword: Drakes Bay

Place_Keyword: Point Reyes

Place_Keyword: Tomales Point

Place_Keyword: Bodega Head

Access_Constraints: None

Use_Constraints:

Cite John Cherry and the U.S. Army Coastal Engineering Research Center as the originators of the data.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Army Coastal Engineering Research Center

Contact_Address:

Address_Type: Physical

Address: 5201 Little Falls Road NW

City: Washington

State_or_Province: DC

Postal_Code: 20016

Contact_Voice_Telephone: Unknown

Browse_Graphic:

Browse_Graphic_File_Name: CERC_TM14

Browse_Graphic_File_Description:

Screen grab of GIS-produced sample distribution, with bathymetry and land for reference.

Browse_Graphic_File_Type: .jpg

Data_Set_Credit:

USACE CERC and J. Cherry for collection and analysis of data. usSEABED digitization (data): Jennifer Mendonca (USGS); locations: Nadine Golden (USGS). Formatting corrections: Jane Reid (USGS) and Chris Jenkins (University of Colorado).

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 the given parameters.

Completeness_Report:

For inclusion into usSEABED digitized data include Appendix A (Grain size distribution in each of the beach and offshore samples) and Appendix B (Heavy minerals composition of each of the beach and offshore samples).

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Navigational technique not noted in report. Digitization report: Data locations determined by georeferencing location figure, using digital coastline in ArcGIS 8.3 (2004) and are given to 0.0001 decimal degrees. Poor reproduction quality of the report did not allow for precise digitization of the locations of samples 1-167; 221a-c; and 394-579; while these samples are included in usSEABED, the locations should be used with caution.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report: No water depths are given in the report.

Lineage:

Process_Step:

Process_Description:

Beach samples collected with a 3-inch diameter steel tube at approximately Bascom's 1951 mid-tide level of reference. The tube was inserted into the sand to a depth of about 7 inches. Two of these samples, about 2 feet apart comprise the total sample for each location. Nearly all the offshore samples were collected by means of 4.5-inch diameter steel tubes, which were dragged 10 to 50 yards. Only the upper one or two inches generally is sampled by this method. In the laboratory the sediment samples were mixed, washed, and subjected to grain size analysis for sieving in the standard manner (Krumbein and Pettijohn, 1938). The heavy minerals from a split of the 53 to 247-micron size fraction were then separated in bromoform (density 2.89) and the strongly magnetic grains removed by a hand magnet. Petrographic counts were done using a line-count method.

Source_Used_Citation_Abbreviation: Krumbein and Pettijohn, 1938

Source_Used_Citation_Abbreviation: Bascom, 1951

Process_Date: Unknown

Source_Produced_Citation_Abbreviation: CERC_TM14

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Army Coastal Engineering Research Center

Contact_Address:

Address_Type: Physical

Address: 5201 Little Falls Road, NW

City: Washington

State_or_Province: DC

Postal_Code: 20016

Contact_Voice_Telephone: Unknown

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: 588

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.0001

Longitude_Resolution: 0.0001

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: Sample penetration

Attribute_Definition: Penetration of sampler

Attribute_Definition_Source: CERC Technical Memo 14

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.05

Range_Domain_Maximum: 0.18

Attribute_Units_of_Measure: Meter

Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Q50

Attribute_Definition: Median diameter of grainsize

Attribute_Definition_Source: CERC Technical Memo 14

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1.49

Range_Domain_Maximum: 3.74

Attribute_Units_of_Measure: Phi

Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Q10

Attribute_Definition: Tenth percentile of grainsize distribution

Attribute_Definition_Source: CERC Technical Memo 14

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -0.77

Range_Domain_Maximum: 4.32

Attribute_Units_of_Measure: Phi

Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Q25

Attribute_Definition: First quartile of grain size distribution

Attribute_Definition_Source: CERC Technical Memo 14

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -1.14

Range_Domain_Maximum: 4.16

Attribute_Units_of_Measure: Phi

Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Q75

Attribute_Definition: Third quartile of grain size distribution

Attribute_Definition_Source: CERC Technical Memo 14

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -2.17

Range_Domain_Maximum: 3.25

Attribute_Units_of_Measure: Phi

Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Q90

Attribute_Definition: Ninetieth percentile of grain size distribution

Attribute_Definition_Source: CERC Technical Memo 14

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -1.63

Range_Domain_Maximum: 2.83

Attribute_Units_of_Measure: Percent

Attribute_Measurement_Resolution: 0.0001

Attribute:

Attribute_Label: So

Attribute_Definition: Sorting (Standard deviation of grainsize)

Attribute_Definition_Source: Trask, 1932

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1.04

Range_Domain_Maximum: 3.21

Attribute_Units_of_Measure: Percent

Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Heavy mineral analysis

Attribute_Definition: Heavy mineral analysis

Attribute_Definition_Source: CERC Technical Memo 14

Attribute_Domain_Values:

Unrepresentable_Domain:

Percents, in the sand fraction, of apatite, sphene, dark green hornblende, total hornblende, other hornblende, augite, glaucophane, actinolite and tremolite, garnet, hypersthene, ankerite, lawsonite, zircon, epidote, other minerals. Grain counts of biotites and opaques; grain counts of biotite.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Army Coastal Engineering Research Center

Contact_Address:

Address_Type: Physical

Address: 5201 Little Falls Road NW

City: Washington

State_or_Province: DC

Postal_Code: 20016

Contact_Voice_Telephone: Need

Resource_Description: CERC Technical Memomorandum 14; P(200) W124tm2 no. 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, digitization errors, and limitations of the statistical data.

Standard_Order_Process:

Non-digital_Form:

Report is available at some libraries and through the U.S. Army Coastal Engineering Research Center.

Fees: Unknown

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey

Contact_Address:

Address_Type: Mail and physical

Address: 345 Middlefield Road

City: Menlo Park

State_or_Province: CA

Postal_Code: 94025

Contact_Voice_Telephone: 650.329.5026

Contact_Electronic_Mail_Address: men_lib@usgs.gov

Resource_Description: P(200) W124tm2 no. 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 the limitations of the data due to possible imprecision due to navigational inaccuracies, statistical limitations, and digitizing errors.

Standard_Order_Process:

Non-digital_Form:

Report is available for viewing or checkout at the USGS library, Menlo Park, and at other libraries.

Fees: None

Available_Time_Period:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1965

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.