Identification_Information: Citation: Citation_Information: Originator: Margaret A. Hampton Originator: Noah P. Snyder Originator: John L. Chin Originator: Dan W. Allison Originator: David M. Rubin Publication_Date: 2003 Title: Bed-sediment grain-size and morphologic data from Suisun, Grizzly, and Honker Bays, CA 1998-2002 Geospatial_Data_Presentation_Form: Digital Series_Information: Series_Name: Open-file report Issue_Identification: 03-250 Publication_Information: Publication_Place: Menlo Park, CA Publisher: U.S. Geological Survey Other_Citation_Details: Data from USGS cruises J598SF (http://walrus.wr.usgs.gov/infobank/j/j598sf/html/j-5-98-sf.meta.html), J299SF (http://walrus.wr.usgs.gov/infobank/j/j299sf/html/j-2-99-sf.meta.html), J399SF (http://walrus.wr.usgs.gov/infobank/j/j399sf/html/j-3-99-sf.meta.html), J100SF (http://walrus.wr.usgs.gov/infobank/j/j100sf/html/j-1-00-sf.meta.html), P100SF (http://walrus.wr.usgs.gov/infobank/p/p100sf/html/p-1-00-sf.meta.html), P200SF (http://walrus.wr.usgs.gov/infobank/p/p200sf/html/p-2-00-sf.meta.html), P101SF (http://walrus.wr.usgs.gov/infobank/p/p101sf/html/p-1-01-sf.meta.html), P201SF (http://walrus.wr.usgs.gov/infobank/p/p201sf/html/p-2-01-sf.meta.html), P301SF (http://walrus.wr.usgs.gov/infobank/p/p301sf/html/p-3-01-sf.meta.html), P401SF (http://walrus.wr.usgs.gov/infobank/p/p401sf/html/p-4-01-sf.meta.html), and P102SF (http://walrus.wr.usgs.gov/infobank/p/p102sf/html/p-1-02-sf.meta.html. Online_Linkage: http://geopubs.wr.usgs.gov/open-file/of03-250/of03-250.pdf Description: Abstract: "The USGS Place Based Studies Program for San Francisco Bay investigates this sensitive estuarine system to aid in resource management. As part of the inter-disciplinary research program, the USGS collected side-scan sonar data and bed-sediment samples from north San Francisco Bay to characterize bed-sediment texture and investigate temporal trends in sedimentation. The study area is located in central California and consists of Suisun Bay, and Grizzly and Honker Bays, sub-embayments of Suisun Bay. During the study (1998-2002), the USGS collected three side-scan sonar data sets and approximately 300 sediment samples. The side-scan data revealed predominantly fine-grained material on the bay floor. We also mapped five different bottom types from the data set, categorized as featureless, furrows, sand waves, machine-made, and miscellaneous. We performed detailed grain-size and statistical analyses on the sediment samples. Overall, we found that grain size ranged from clay to fine sand, with the coarsest material in the channels and finer material located in the shallow bays. Grain-size analyses revealed high spatial variability in size distributions in the channel areas. In contrast, the shallow regions exhibited low spatial variability and consistent sediment size over time." Purpose: " ........ to characterize bed-sediment texture and investigate temporal trends in sedimentation." Supplemental_Information: Specific cruise identifications with links to metadata provided by the USGS Coastal and Marine Geology team's Infobank are given in table 1 of the report. Data included in usSEABED (http://walrus.wr.usgs.gov/usseabed) Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19981125 Ending_Date: 20020123 Currentness_Reference: Publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -122.14047 East_Bounding_Coordinate: -121.93249 North_Bounding_Coordinate: 38.15529 South_Bounding_Coordinate: 38.03148 Keywords: 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 Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: U.S. Geological Survey Theme_Keyword: Coastal and Marine Geology Program Theme_Keyword: Place Based Studies for San Francisco Bay Theme_Keyword: Box core Theme_Keyword: Van Veen grab sampler Place: Place_Keyword_Thesaurus: Geographic Names Information System Place_Keyword: Suisun Bay Place_Keyword: Grizzly Bay Place_Keyword: Honker Bay Place_Keyword: California Access_Constraints: Report is available online in PDF format; Adobe Acrobat Reader required to view. Use_Constraints: Cite the U.S. Geological Survey as the originators of the data. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: United States Geological Survey Contact_Address: Address_Type: Mail Address: USGS Information Services Address: Box 25286 City: Denver State_or_Province: CO Postal_Code: 80225 Contact_Voice_Telephone: 1-800-ASK-USGS Browse_Graphic: Browse_Graphic_File_Name: OFR_03-250 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: Margaret A. Hampton, Noah P. Snyder, John L. Chin, Dan W. Allison, David M. Rubin at the United States geological Survey for the collection and analysis of the data. For usSEABED, formatting: Jane Reid (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 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: See report ://geopubs.wr.usgs.gov/open-file/of03-250/of03-250.pdf. For usSEABED, digitized data were incorporated as is. Where appropriate, data were tested for completeness using MS Excel. Locations checked using GIS. Logical_Consistency_Report: From the report: "In order to facilitate comparisons between the samples, we omitted the coarsest material (>1 mm) from the RV Johnston samples for the computer analysis. We made this change for two reasons: 1) this size category was processed using different methods at various times during the study, and therefore not quantitatively comparable; and 2) we found that in nearly every case the coarsest material was predominately composed of shells and not elastic sediment. By omitting this category from the analysis, we aided comparisons between the data sets, and reduced skewing of the statistics by non-bed-sediment material. However, we chose not to omit this size fraction from the RV Polaris analyses due to the consistent methodology used in processing the samples." Completeness_Report: See report. For inclusion into usSEABED, all data in the report were included. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: See report http://geopubs.wr.usgs.gov/open-file/of03-250/of03-250.pdf Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: See report http://geopubs.wr.usgs.gov/open-file/of03-250/of03-250.pdf Lineage: Process_Step: Process_Description: See report: http://geopubs.wr.usgs.gov/open-file/of03-250/of03-250.pdf Process_Date: 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: 280 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.00001 Longitude_Resolution: 0.00001 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 number Attribute_Definition: Sample number Attribute_Definition_Source: US Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Alpha numeric number based on cruise and core information Attribute: Attribute_Label: Subsample depth Attribute_Definition: Depth of subsample within sample (top = 0) Attribute_Definition_Source: Source report Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 0.01 Attribute_Units_of_Measure: Meters Attribute_Measurement_Resolution: 0.01 Attribute: Attribute_Label: Gravel Attribute_Definition: Amount of gravel in subsample Attribute_Definition_Source: Source report Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 16.45 Attribute_Units_of_Measure: Percent Attribute_Measurement_Resolution: 0.01 Attribute: Attribute_Label: Sand Attribute_Definition: Amount of sand in subsample Attribute_Definition_Source: Source report Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.17 Range_Domain_Maximum: 99.51 Attribute_Units_of_Measure: Percent Attribute_Measurement_Resolution: 0.01 Attribute: Attribute_Label: Silt Attribute_Definition: Amount of silt in subsample Attribute_Definition_Source: Source report Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.35 Range_Domain_Maximum: 72.32 Attribute_Units_of_Measure: Percent Attribute_Measurement_Resolution: 0.01 Attribute: Attribute_Label: Clay Attribute_Definition: Amount of clay in subsample Attribute_Definition_Source: Source report Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.09 Range_Domain_Maximum: 69.85 Attribute_Units_of_Measure: Percent Attribute_Measurement_Resolution: 0.01 Attribute: Attribute_Label: Mud Attribute_Definition: Amount of mud in subsample Attribute_Definition_Source: Source report Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.49 Range_Domain_Maximum: 99.83 Attribute_Units_of_Measure: Percent Attribute_Measurement_Resolution: 0.01 Attribute: Attribute_Label: Median Attribute_Definition: Median grain size Attribute_Definition_Source: Source report Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.1 Range_Domain_Maximum: 9.34 Attribute_Units_of_Measure: Phi Attribute_Measurement_Resolution: 0.01 Attribute: Attribute_Label: Mean Attribute_Definition: First moment of grain-size distribution (mean) Attribute_Definition_Source: Source report Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.21 Range_Domain_Maximum: 9.54 Attribute_Units_of_Measure: Phi Attribute_Measurement_Resolution: 0.01 Attribute: Attribute_Label: Sorting Attribute_Definition: Second moment of grain-size distribution (standard deviation) Attribute_Definition_Source: Source report Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.58 Range_Domain_Maximum: 3.8 Attribute_Units_of_Measure: Phi Attribute_Measurement_Resolution: 0.01 Attribute: Attribute_Label: Skewness Attribute_Definition: Third moment of grain-size distribution (skewness) Attribute_Definition_Source: Source report Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -1.02 Range_Domain_Maximum: 5.74 Attribute_Units_of_Measure: Unitless Attribute_Measurement_Resolution: 0.01 Attribute: Attribute_Label: Kurtosis Attribute_Definition: Fourth moment of grain-size distribution (kurtosis) Attribute_Definition_Source: Source report Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.65 Range_Domain_Maximum: 73.13 Attribute_Units_of_Measure: Unitless Attribute_Measurement_Resolution: 0.01 Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: United States Geological Survey Contact_Address: Address_Type: Mail Address: USGS Information Services Address: Box 25286 City: Denver State_or_Province: CO Postal_Code: 80225 Contact_Voice_Telephone: 1-800-ASK-USGS Resource_Description: Open file report 03-250 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 through the USGS; available online at: http://geopubs.wr.usgs.gov/open-file/of03-250/of03-250.pdf Fees: None Technical_Prerequisites: Adobe Acrobat required: Download: http://www.adobe.com/products/acrobat/readermain.html Available_Time_Period: Time_Period_Information: Single_Date/Time: Calendar_Date: 2003 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.