Identification_Information: Citation: Citation_Information: Originator: Byron Schatz Publication_Date: 1963 Title: A restudy of bottom sediments near the entrance of the Golden Gate Geospatial_Data_Presentation_Form: Paper Series_Information: Series_Name: Hydraulic Engineering Laboratory Technical Report Issue_Identification: HEL 4-3 Publication_Information: Publication_Place: Berkeley, CA Publisher: University of California Description: Abstract: No specific abstract is given in the report Purpose: "A restudy of the selected offshore samples was initiated in order to determine the existence of zones of heavy minerals or 'pay streaks' of heavy mineral accumulation and their relation to median grain diameters of bottom surface sediments." Supplemental_Information: This work was related to NSF Grant G-18123. Several maps were prepared using the mechanical analysis data of Trask 1953. 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: 1969 Currentness_Reference: Publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -122.7931 East_Bounding_Coordinate: -122.4831 North_Bounding_Coordinate: 37.8588 South_Bounding_Coordinate: 37.7234 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: University of California, Berkeley Theme_Keyword: Hydraulic Engineering Laboratory 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: Golden Gate Bridge Access_Constraints: Available at the USGS library and others Use_Constraints: Cite Byron Schatz 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: HEL4-3 Browse_Graphic_File_Description: Sample distribution with bathymetry and coastline for reference Browse_Graphic_File_Type: .jpg Data_Set_Credit: Byron Scatz at the University of California at Berkeley for the collection and analysis of data. For inclusion into usSEABED: Digitization: Jennifer Mendonca (USGS, data) and Nadine Golden (USGS, locations); 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 median grain size values. Completeness_Report: All data were digitized unless locations or values could not be resolved during digitization. Percents of heavy minerals in the 74 to 177 micron size range was digitized from figure 5. Not digitized were the percent of bottom samples in the 77 to 147 micron size range and the percent of bottom samples in the 105 to 61 micron size range (figures 3 and 4, respectively) Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Navigational technique not stated, although some samples may have been gathered by Navy divers. Locations were digitized in ArcMap 8.3 using a scanned copy of the figure 1. Lineage: Process_Step: Process_Description: Grain size processing technique is not given in report. Heavy mineral separation by bromoform; identification technique not stated in report. For usSEABED, locations were digitized using ArcMap 8.3, and sitenames represent median grain size in microns. Process_Date: 1962 Source_Produced_Citation_Abbreviation: HEL 4-3 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: 195 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: Median Attribute_Definition: Median grain size Attribute_Definition_Source: Source report Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 20 Range_Domain_Maximum: 670 Attribute_Units_of_Measure: Microns Attribute_Measurement_Resolution: 1.0 Attribute: Attribute_Label: Heavy minerals Attribute_Definition: Heavy minerals in 74-177 micron size fraction Attribute_Definition_Source: Source report Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 61 Attribute_Units_of_Measure: Percent Attribute_Measurement_Resolution: 1.0 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 2-4 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 libraries. Fees: None 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: S(276) UN39hel no. 4-3 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 Technical_Prerequisites: None Available_Time_Period: Time_Period_Information: Single_Date/Time: Calendar_Date: 1964 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.