Roberts Sediment Samples

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: David C. Twichell
Publication_Date: 20000000
Title: Roberts Sediment Samples
Publication_Information:
Publication_Place: Woods Hole, MA
Publisher: U.S. Geological Survey
Description:
Abstract:
Two 21-day field operations were conducted in 1997 and 1998 in the estuaries and on the inner continental shelf off the northern Oregon and southern Washington coast. These cruises aboard the R/V Corliss were run in order to generate reconnaissance maps of the seafloor geology and the shallow subsurface stratigraphy using sidescan-sonar and seismic-reflection mapping techniques. The 1998 cruise also collected sediment grab samples, bottom photographs, and video images to verify the sidescan-sonar imagery and to document the seafloor geology. The combination of these data with previously collected sediment sample data (Robert, 1974; Nittrouer, 1978; and Smith et. al., 1980) has been used to define the extent and lithology of shelf sediments associated with the Columbia River littoral cell. This work is one component of a larger project studying the erosion of the Washington Oregon coasts and is being coordinated by the U.S. Geological Survey and the Washington State Department of Ecology. The reasons for collecting these data are to provide a regional synthesis of the offshore geology for this project and to support a wide variety of management decisions and to provide a basis for further process-oriented investigations.
Purpose:
This GIS overlay represents sediment sample locations and analyses information collected by R.W. Roberts.
Supplemental_Information:
Roberts, R.W., 1974, Marine sedimentological data of the Washington continental shelf: University of Washington, Department of Oceanography Special Report 57, 129p.

Nittrouer, C.A., 1978, The process of detrital sediment accumulation in a continental shelf environment: an examination of the Washington shelf: PhD Thesis, University of Washington, Seattle, WA. 243p.

Smith, J.M., Messmer, L.W., Phipps, J.B., Samuelson, D.F., and Schermer, E.D., 1980, Grays Harbor and Chehalis River improvements to navigation environmental studies - Grays Harbor ocean disposal study: literature review and preliminary benthic sampling: U.S. Army Corps of Engineers Internal Report.

Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 19740000
Currentness_Reference: 1978
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -126.400000
East_Bounding_Coordinate: -123.080000
North_Bounding_Coordinate: +49.040000
South_Bounding_Coordinate: +45.900000
Keywords:
Theme:
Theme_Keyword_Thesaurus: General
Theme_Keyword: ArcView
Theme_Keyword: shapefile
Theme_Keyword: surficial geology
Theme_Keyword: sediment samples
Theme_Keyword: points
Place:
Place_Keyword_Thesaurus: General
Place_Keyword: Pacific Ocean
Place_Keyword: Washington
Place_Keyword: Oregon
Place_Keyword: WA
Place_Keyword: OR
Place_Keyword: Columbia River
Place_Keyword: Columbia River littoral cell
Place_Keyword: Inner shelf
Place_Keyword: Washington continental shelf
Place_Keyword: Washington coastal zone
Temporal:
Temporal_Keyword_Thesaurus: General
Temporal_Keyword: Modern
Access_Constraints: None
Use_Constraints: None
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: David C. Twichell
Contact_Organization: U.S. Geological Survey
Contact_Position: Oceanographer
Contact_Address:
Address_Type: mailing and physical address
Address:
U.S. Geological Survey
Woods Hole Field Center
384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: dtwichell@usgs.gov
Data_Set_Credit:
This sediment sample information was compiled from published literature by Gita Dunhill at U.S. Geological Survey in Menlo Park, California.
Cross_Reference:
Citation_Information:
Originator: Roberts, R.W.
Publication_Date: 19740000
Title: Marine sedimentological data of the Washington continental shelf
Publication_Information:
Publication_Place: Seattle, Washington
Publisher: University of Washington, Department of Oceanography Special Report 57
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
This dataset was taken from published literature, therefore the accuracy is somewhat unknown, but expected to be high.
Logical_Consistency_Report:
The sediment sample information is expected to follow certain scientific standards.
Completeness_Report:
Completeness of this dataset is unknown because it was acquired through a third person.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Given the time frame of the collection of the sediment samples, the assumption is that the navigation used was Loran-C. This system is conservatively given a horizonal positional accuracy of 100m.
Lineage:
Process_Step:
Process_Description:
The sediment sample information was compiled from published literature and placed into an Excel spreadsheet. This information was then converted to an ArcInfo point coverage with certain attribute information attached to each point from the Excel spreadsheet. This ArcInfo point coverage was then converted to an ArcView shapefile. Position information was converted to datums that correspond to the other datasets used in this project.
Process_Date: 19980000
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address:
U.S. Geological Survery
Woods Hole Field Center
384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: 508-548-8700
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Point
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.0009
Longitude_Resolution: 0.0013
Geographic_Coordinate_Units: Decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222101
Vertical_Coordinate_System_Definition:
Depth_System_Definition:
Depth_Datum_Name: unknown - probably local sealevel
Depth_Resolution: unknown
Depth_Distance_Units: Meters
Depth_Encoding_Method: Attribute values
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: roberts.dbf
Entity_Type_Definition: ArcView shapefile attribute table
Entity_Type_Definition_Source: ESRI
Attribute:
Attribute_Label: Long
Attribute_Definition:
Longitude coordinate of sample recorded in decimal degrees.
Attribute_Definition_Source: Data processor - VeeAnn A. Cross
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -126.3333
Range_Domain_Maximum: -123.0917
Unrepresentable_Domain: character set
Attribute_Units_of_Measure: Decimal degrees
Attribute:
Attribute_Label: Lat
Attribute_Definition:
Latitude coordinate of sample recorded in decimal degrees.
Attribute_Definition_Source: Data processor - VeeAnn A. Cross
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 45.9167
Range_Domain_Maximum: 48.9833
Attribute_Units_of_Measure: Decimal degrees
Attribute:
Attribute_Label: Samp_id
Attribute_Definition:
Sediment sample identification label assigned in the published literature.
Attribute_Definition_Source: Sample collector
Attribute_Domain_Values:
Unrepresentable_Domain: character field
Attribute:
Attribute_Label: Gravel
Attribute_Definition: Percentage of the total sediment sample larger than or equal to -1.00 phi (>= 2.0 mm).
Attribute_Definition_Source: Based on the Udden-Wentworth sediment classification, with the phi scale devised by Krumbein
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 90.26
Attribute_Units_of_Measure: percentage of total sample
Attribute:
Attribute_Label: Sand
Attribute_Definition:
Percentage of total sediment sample that falls in the range of less than -1 phi (2.0 mm) to 4 phi (62.5 µm).
Attribute_Definition_Source: Based on the Udden-Wentworth sediment classification scale, with the phi scale devised by Krumbein.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.10
Range_Domain_Maximum: 99.99
Attribute_Units_of_Measure: Percentage of total sample.
Attribute:
Attribute_Label: Silt
Attribute_Definition:
Percentage of total sediment sample that falls in the range of less than 4 phi (62.5 µm) to 8 phi (3.91 µm).
Attribute_Definition_Source: Based on the Udden-Wentworth sediment classification scale with the phi scale devised by Krumbein.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 87.47
Attribute_Units_of_Measure: Percentage of total sample
Attribute:
Attribute_Label: Clay
Attribute_Definition: Percentage of total sediment sample less than 8 phi (3.91 µm).
Attribute_Definition_Source: Based on the Udden-Wentworth sediment classification scale, with the phi scale devised by Krumbein.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 82.84
Attribute_Units_of_Measure: Percentage of total sample.
Attribute:
Attribute_Label: Siltclay
Attribute_Definition:
Percentage of the total sediment sample that falls in the silt plus clay fraction i.e. less than 4 phi (62.5 µm).
Attribute_Definition_Source: User defined based on sediment classification schemes.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 99.89
Attribute_Units_of_Measure: Percentage of total sample
Attribute:
Attribute_Label: Depth_m
Attribute_Definition:
Water depth from sea surface to sea floor where the sediment sample was acquired.
Attribute_Definition_Source: User defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 6
Range_Domain_Maximum: 933 with no data values represented as 9999
Attribute_Units_of_Measure: meters
Overview_Description:
Entity_and_Attribute_Overview:
In order to convert from phi to mm, the following equation can be used:  mm=2-(phi)
Entity_and_Attribute_Detail_Citation: Wentworth, C.K., 1929, Method of computing mechanical composition types in sediments: Geological Society of America Bulletin, v.40, p.771-790.
Entity_and_Attribute_Detail_Citation: Krumbein, W.C., 1934, Size frequency distributions of sediments: Journal of Sedimentary Petrology, v. 4, p.65-77.
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Nancy Soderberg
Contact_Organization: U.S. Geological Survey
Contact_Position: Data Librarian
Contact_Address:
Address_Type: mailing and physical address
Address:
U.S. Geological Survey
Woods Hole Field Center
384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700
Contact_Facsimile_Telephone: 508-457-2313
Contact_Electronic_Mail_Address: nsoderberg@usgs.gov
Resource_Description: U.S. Geological Survey CD-ROM Open-File Report
Distribution_Liability:
This Compact Disc-Read Only Memory (CD-ROM) publication was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data published on this CD-ROM have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and/or the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of this data, software, or related materials.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ARCV
File_Decompression_Technique: No compression applied
Digital_Transfer_Option:
Offline_Option:
Offline_Media: CD-ROM
Recording_Capacity:
Recording_Density: 650
Recording_Density_Units: MBytes
Recording_Format: ISO 9600 with Rock Ridge extensions
Compatibility_Information: UNIX, DOS, MAC
Fees: none at this time
Technical_Prerequisites:
These sediment sample data are available in ArcView shapefile format. The user must have ArcView, Arc Explorer, or another GIS package capable of importing and reading these data.
Metadata_Reference_Information:
Metadata_Date: 20000119
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address:
U.S. Geological Survey
Woods Hole Field Center
384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: 19940608

Generated by mp on Tue Jan 25 17:32:10 2000