Sediment grain size data, San Pedro shelf, southern California - TEXTURE.SHP

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Eleyne L. Phillips
Originator: Charlene Parsons
Originator: Florence L. Wong
Publication_Date: 2012
Title:
Sediment grain size data, San Pedro shelf, southern California - TEXTURE.SHP
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: U.S. Geological Survey Data Series
Issue_Identification: 552
Publication_Information:
Publication_Place: Menlo Park, CA
Publisher: U.S. Geological Survey
Online_Linkage: <https://pubs.usgs.gov/ds/552/>
Larger_Work_Citation:
Citation_Information:
Originator: Florence L. Wong
Originator: Brian D. Edwards
Originator: Peter Dartnell
Originator: Eleyne L. Phillips
Publication_Date: 2012
Title:
Seafloor Geology and Benthic Habitats of the San Pedro shelf, southern California
Geospatial_Data_Presentation_Form: map
Series_Information:
Series_Name: U.S. Geological Survey Digital Series
Issue_Identification: 552
Publication_Information:
Publication_Place: Menlo Park, California
Publisher: U.S. Geological Survey
Online_Linkage: <https://pubs.usgs.gov/ds/552/>
Description:
Abstract:
Texture.shp is a GIS file describing grain size characteristics of sediment samples collected by the U.S. Geological Survey between November 29 and December 10, 2004 during survey E-2-04-SC.
This data set is one of a collection of digital files of a geographic information system (GIS) of spatially referenced data related to the study of seafloor geology and benthic habitats of the San Pedro shelf off southern California.
The San Pedro shelf study area covers approximately 400 sq km offshore of the metropolitan Los Angeles area out to a water depth of about 150 m (492 ft). The seafloor hosts a rich and varied biologic community and is subject to anthropogenic inputs from shipping traffic, sewage outfall systems, commercial fisheries, and recreational use. Between 1998 and 2004, the U.S. Geological Survey (in cooperation with Los Angeles and Orange County Sanitation Districts) mapped the seafloor with sonar technologies, collected video and still photography, and collected sediment samples to develop a characterization of this shelf area.
Purpose:
These data are intended for science researchers, students, policy makers, and the general public. The data can be used with geographic information systems (GIS) software to display geologic and oceanographic information.
Supplemental_Information:
Additional information about the field activities from which this data set was derived are available online at 
 <http://walrus.wr.usgs.gov/infobank/e/e204sc/html/e-2-04-sc.meta.html>
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2004
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned.
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -118.338133
East_Bounding_Coordinate: -117.949982
North_Bounding_Coordinate: 33.715607
South_Bounding_Coordinate: 33.562234
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: benthic habitat
Theme_Keyword: coastal shelf
Theme_Keyword: coastal geology
Theme_Keyword: seafloor geology
Theme_Keyword: seafloor character
Theme_Keyword: seafloor habitat
Theme_Keyword: sediment grain size
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: environment
Theme_Keyword: geoscientificInformation
Theme_Keyword: oceans
Place:
Place_Keyword_Thesaurus: Geographic Names Information System
Place_Keyword: San Pedro, California
Place_Keyword: San Pedro Bay, California
Place_Keyword: Long Beach, California
Place_Keyword: Los Angeles, California
Place_Keyword: Los Angeles Harbor, California
Place_Keyword: Long Beach Middle Harbor, California
Place_Keyword: Seal Beach, California
Place_Keyword: California
Place_Keyword: USA
Place:
Place_Keyword_Thesaurus: GEOnet Names Server
Place_Keyword: north Pacific Ocean
Place:
Place_Keyword_Thesaurus: none
Place_Keyword: San Pedro shelf, southern California
Access_Constraints: None
Use_Constraints: None
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Florence L. Wong
Contact_Address:
Address_Type: mailing address
Address: 345 Middlefield Road Mail Stop 999
City: Menlo Park
State_or_Province: CA
Postal_Code: 94025
Country: USA
Contact_Voice_Telephone: 650-329-5327
Contact_Electronic_Mail_Address: fwong@usgs.gov
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.3500
Cross_Reference:
Citation_Information:
Originator: Robert L. Folk
Publication_Date: 1980
Title: Petrology of Sedimentary Rocks
Edition: 1980
Geospatial_Data_Presentation_Form: document
Publication_Information:
Publication_Place: Austin TX
Publisher: Hemphill Publishing Co.
Data_Quality_Information:
Logical_Consistency_Report: Point features present.
Completeness_Report:
Commonly reported grain size intervals (phi sizes) are not available for this data set due to file corruption.
Lineage:
Process_Step:
Process_Description: Metadata imported.
Source_Used_Citation_Abbreviation: d:\TEMP\xmlFE.tmp
Process_Date: 20100601
Process_Time: 10224200
Process_Step:
Process_Description:
A determination of sample homogeneity and sorting was made by visual inspection. 5-25 gm of wet sample were used - the lesser amount was taken for better sorted samples. To remove organic material, the sample was placed in beakers with 200 ml or more of distilled water and 5-10 ml of 30-35% hydrogen peroxide (H2O2) and soaked overnight or longer if the bubbling of the oxidation reaction was still observed. The sample was then heated to remove excess H2O2. Salts were removed by centrifugation and decanting.
Samples were wet-sieve into 3 size classes: gravel (>2mm; on a #10 sieve), sand (2mm-0.063 mm; on #230 sieve) and mud (or silt and clay; collected in graduated cylinders). The gravel and sand fractions are dried and weighed. Sand was analyzed in the USGS settling tubes using SedLabHost (USGS Western Coastal and Marine Geology software) to collect and process the settling velocity data.
The mud is collected in 1000 ml graduated cylinders to which is added 5-10 ml of a 1% calgon (sodium hexametaphosphate (NaPO3)6) solution, topped off to 1000 ml with distilled water, agitated for 2 minutes, and allowed to sit overnight. The mud is agitated with a stirring rod for two minutes. At time 20 seconds after agitation a 20 ml aliquot of the suspension is taken by pipette, 20 cm deep into the graduated cylinder. The 20 ml fraction is dried and weighted. The dry weight of the 20 ml aliquot is multiplied by 50 to for the total weight of the mud in the 1000 ml suspension (20 ml is 1/50th of the 1000 ml suspension).
Processor: Charlene Parsons
The weight data from each size fraction were combined and processed using the USGS WCMG software called pcSDSZ.
Processor: Eleyne Phillips
Process_Date: 2006
Process_Step:
Process_Description: Metadata imported.
Source_Used_Citation_Abbreviation: d:\TEMP\xml99.tmp
Process_Date: 20100913
Process_Time: 11181700
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Entity point
Point_and_Vector_Object_Count: 183
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.000001
Longitude_Resolution: 0.000001
Geographic_Coordinate_Units: Decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: D_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257224
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: texture
Entity_Type_Definition: sediment grain size properties
Entity_Type_Definition_Source: Folk, 1980
Attribute:
Attribute_Label: FID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: seq
Attribute_Definition: sequence number by station and sample id
Attribute_Definition_Source: this study
Attribute_Domain_Values:
Unrepresentable_Domain: sequential whole numbers
Attribute:
Attribute_Label: SampleID
Attribute_Definition:
sample identification; BG indicates box/grabber sampling device.
Attribute_Definition_Source: This study
Attribute_Domain_Values:
Unrepresentable_Domain: sample identification
Attribute:
Attribute_Label: LONGITUDE
Attribute_Definition: longitude
Attribute_Definition_Source: standard usage
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -180
Range_Domain_Maximum: 180
Attribute:
Attribute_Label: LATITUDE
Attribute_Definition: latitude
Attribute_Definition_Source: standard usage
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -90
Range_Domain_Maximum: 90
Attribute:
Attribute_Label: GRAVEL
Attribute_Definition: percent gravel by weight
Attribute_Definition_Source: Folk, 1980
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 100
Attribute:
Attribute_Label: SAND
Attribute_Definition: percent sand by weight
Attribute_Definition_Source: Folk, 1980
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 100
Attribute:
Attribute_Label: MUD
Attribute_Definition: percent mud by weight
Attribute_Definition_Source: Folk, 1980
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 100
Attribute:
Attribute_Label: SILT
Attribute_Definition: percent silt by weight
Attribute_Definition_Source: Folk, 1980
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 100
Attribute:
Attribute_Label: CLAY
Attribute_Definition: percent clay by weight
Attribute_Definition_Source: Folk, 1980
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 100
Attribute:
Attribute_Label: FOLK_CLASS
Attribute_Definition: sediment text classification
Attribute_Definition_Source: Folk, 1980
Attribute_Domain_Values:
Unrepresentable_Domain: classes based on ratios of gravel, sand, silt, clay
Attribute:
Attribute_Label: CLASS_SYM
Attribute_Definition: sediment class symbol
Attribute_Definition_Source: Folk, 1980
Attribute_Domain_Values:
Unrepresentable_Domain:
abbreviations for names of classes based on ratios of gravel, sand, silt, clay
Attribute:
Attribute_Label: GV_GT01
Attribute_Definition: gravel content > 0.1 percent
Attribute_Definition_Source: this study
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 1
Enumerated_Domain_Value_Definition: gravel content > 0.1 percent
Enumerated_Domain_Value_Definition_Source: this study
Attribute:
Attribute_Label: STATION
Attribute_Definition: sampling station number
Attribute_Definition_Source: this study
Attribute_Domain_Values:
Unrepresentable_Domain: sample location sequence number
Attribute:
Attribute_Label: SUBID
Attribute_Definition: box grab sample identification
Attribute_Definition_Source: this study
Attribute_Domain_Values:
Unrepresentable_Domain: box grab (BG) sample number and sampling interval, if present
Attribute:
Attribute_Label: TOP_SAMP
Attribute_Definition: uppermost subsample flag
Attribute_Definition_Source: this study
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 1
Enumerated_Domain_Value_Definition: uppermost subsample, if more than one present
Enumerated_Domain_Value_Definition_Source: this study
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Florence L. Wong
Contact_Address:
Address_Type: mailing address
Address: 345 Middlefield Road Mail Stop 999
City: Menlo Park
State_or_Province: CA
Postal_Code: 94025
Country: USA
Contact_Voice_Telephone: (650) 329-5327
Contact_Electronic_Mail_Address: fwong@usgs.gov
Resource_Description: Downloadable Data
Distribution_Liability:
Please recognize the U.S. Geological Survey (USGS) as the source of this information.
Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data.
The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ARCE
Format_Version_Number: 9.3.1
Transfer_Size: 0.005
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <https://pubs.usgs.gov/ds/552/>
Fees: None.
Metadata_Reference_Information:
Metadata_Date: 20100913
Metadata_Review_Date: 2010
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Florence L Wong
Contact_Address:
Address_Type: mailing address
Address: 345 Middlefield Road Mail Stop 999
City: Menlo Park
State_or_Province: CA
Postal_Code: 94025
Country: USA
Contact_Voice_Telephone: 650-329-5327
Contact_Electronic_Mail_Address: fwong@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile
Generated by mp version 2.9.15 on Mon Jul 30 14:52:59 2012