Holocene stratigraphy and sedimentation on the northern California continental shelf

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Jeffry Calvert Borgeld
Publication_Date: 1985
Title:
Holocene stratigraphy and sedimentation on the northern California continental shelf
Geospatial_Data_Presentation_Form: Paper
Publication_Information:
Publication_Place: Seattle, WA
Publisher: University of Washington
Other_Citation_Details:
Textural class (%gravel, sand, silt, clay) data via personal communication from J. Borgeld to M. Zimmermann, 1996
Description:
Abstract:
"The northern California continental shelf can be subdivided into three shelf sections based on sediment characteristics: the Klamath River shelf, from Point St. George to Patricks Point; the Eel River shelf, from Patricks Point to Eel Canyon; and the shelf south of Eel Canyon. Three sediment types predominate on the shelf. The nearshore zone, to a depth of 55 to 65 meters, is covered by fine to very fine sands that are transported by waves. The mid-shelf on the Klamath River shelf is covered by clayey silts or silty clays that accumulate from the Klamath River suspended load. The outer shelf is covered by palimpsest silty sand. On the Eel River shelf, the mid- and outer- shelf is covered by clayey silts or silty clays that accumulate from the Eel River suspended load. On the shelf south of Eel Canyon, muds occur ponded between outcrops of underlying rocks. The clayey silts or silty clays began to accumulate during the Holocene transgression, approximately 10,000 to 12,000 BP. The base of this mud facies is time transgressive; the outer shelf portions began to accumulate prior to the mid-shelf portions. Below the mud facies, late-Quaternary units lie above an unconformity, separating the late-Quaternary units from pre-Quaternary units that make up the shelf platform. These late-Quaternary units crop out on the outer Klamath River shelf where they consist of palimpsest silty sands. The boundary between the Holocene mud facies and the nearshore sand facies is characterized by alternating layers of mud and silty sands. The alternations were produced by a migrating facies boundary due to changes in incoming waves. The facies boundary migrated between at least 46 and 71 meters waters depth during the Holocene. Flood-produced strata are preserved in the Holocene mud facies in the vicinity of the Eel River mouth. These flood-produced strata are composed of brown very fine sands and coarse silts, and contain layers of wood fragments. These flood-produced deposits are restricted to the shelf directly offshore of the Eel River mouth and slightly northward. These deposits were created during the December, 1964, flooding of the Eel River."
Purpose:
"This treatise represents a contribution to the understanding and characterization of shelf deposits and shelf processes. In particular, the evaluation of flood related stratigraphy on a modern shelf which is presently accumulating sediment."
Supplemental_Information: Data digitized for inclusion into usSEABED.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1972
Ending_Date: 1979
Currentness_Reference: Publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -124.6100
East_Bounding_Coordinate: -124.0883
North_Bounding_Coordinate: 41.7683
South_Bounding_Coordinate: 40.4333
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: University of Washington, Seattle
Theme_Keyword: Shipek grab
Theme_Keyword: Gravity core
Theme_Keyword: Smith-McIntyre grab
Theme_Keyword: Sediment dredge
Theme_Keyword: Box core
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
Place_Keyword: California
Place_Keyword: Humboldt Bay
Place_Keyword: Mendocino, Cape
Place_Keyword: Eel River
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: offshore Humboldt Bay
Place_Keyword: Point St. George
Temporal:
Temporal_Keyword_Thesaurus: Geologic
Temporal_Keyword: late Quaternary
Temporal_Keyword: Holocene
Access_Constraints:
None. Thesis is available at the USGS Library and other libraries.
Use_Constraints:
Cite Jeff Borgeld and the University of Washington as originators of the data.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Jeff Borgeld
Contact_Organization: Now at Humboldt State University
Contact_Address:
Address_Type: Physical
Address: Department of Oceanography
Address: 1 Harpst Street
City: Arcata
State_or_Province: CA
Postal_Code: 95521-8299
Contact_Voice_Telephone: (707) 826-3328
Contact_Facsimile_Telephone: (707) 826-4145
Contact_Electronic_Mail_Address: jdb2@humboldt.edu
Browse_Graphic:
Browse_Graphic_File_Name: Borgeld_PhD_85
Browse_Graphic_File_Description:
Sample distribution with coastline and bathymetry for reference.
Browse_Graphic_File_Type: .jpg
Data_Set_Credit:
Jeffry Calvert Borgeld at the University of Washington for the collection and analysis of data. For inclusion into usSEABED: digitization: Halimeda Kilbourne (USGS) and Mark Zimmermann (NOAA) 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:
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:
Tests were performed on the textural class values to ensure completeness.
Completeness_Report: All data were digitized, except river samples.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Navigation method unknown; no assessment made for location accuracy.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Depth determination method unknown; no assessment made for accuracy.
Lineage:
Process_Step:
Process_Description:
Bottom sediment samples were treated with a 30 percent hydrogen peroxide, to oxidize organic matter, and then analyzed using standard sieve (Whitby, 1958; American Society for Testing Materials, 1963); W.S. Tyler Col., 1967) and pipette (Rolfe et al., 1960; Galehouse, 1971) techniques. The pipette analyses were carried out using 1.0 gram per liter sodium hexametaphosphate as a dispersing agents. The sand sizes were dry sieved to 1/4 phi intervals, the silt sizes were pipetted to 1/2 phi intervals, and the clay sizes were pipetted to full phi intervals. Material smaller than 11 phi was collectively grouped and termed 12 phi. Density separations of the sand-sized fractions of samples collected from the shelf during August 1979 and from northern California rivers during September 1979 were performed using standard centrifuge techniques (Rittenhouse and Bertholf, Jr., 1942; Browning, 1961; Carver, 1971). Three density splits, the light minerals (densities less than 2.96 g/cm3), the light heavy minerals (densities between 2.96 and 3.32 g/cm3) and heavy heavy minerals (densities greater than 3.32 g/cm3) were separated using tetrabromoethane (density 2.96 g/cm3) and diiodomethane (density, 3.32 g/cm3). From Jeff Borgeld's email to Mark Zimmermann, 6/17/96: "The samples were sieved to 1/4 phi in the sands and pipetted for the silts and clays. I have individual sample sheets to that level, but no complete summary other than what is included [here]."
Source_Used_Citation_Abbreviation: American Society for Testing Materials, 1963
Source_Used_Citation_Abbreviation: Browning, 1961
Source_Used_Citation_Abbreviation: Carver, 1971
Source_Used_Citation_Abbreviation: Galehouse, 1971
Source_Used_Citation_Abbreviation: Rolfe et al., 1960
Source_Used_Citation_Abbreviation: Rittenhouse and Bertholf, Jr., 1942
Source_Used_Citation_Abbreviation: W.S. Tyler Col.,1967
Source_Used_Citation_Abbreviation: Whitby,1958
Process_Date: Unknown
Source_Produced_Citation_Abbreviation: Borgeld_PhD_1985
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Jeff Borgeld
Contact_Organization: Now at Humboldt State University
Contact_Address:
Address_Type: Physical
Address: Department of Oceanography
Address: 1 Harpst Street
City: Arcata
State_or_Province: CA
Postal_Code: 95521-8299
Contact_Voice_Telephone: (707) 826-3328
Contact_Facsimile_Telephone: (707) 826-4145
Contact_Electronic_Mail_Address: jdb2@humboldt.edu

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: 107

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 number
Attribute_Definition: Sample number
Attribute_Definition_Source: University of Washington
Attribute_Domain_Values:
Unrepresentable_Domain:
Alpha numeric code based on cruise identification and sample number.
Attribute:
Attribute_Label: Cruise number
Attribute_Definition: Cruise identification
Attribute_Definition_Source: Source report
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: TT141
Enumerated_Domain_Value_Definition: R/V Thomas G. Thompson, August 1979
Enumerated_Domain_Value_Definition_Source: Source report
Enumerated_Domain:
Enumerated_Domain_Value: TO
Enumerated_Domain_Value_Definition: R/V Catalyst, January 1973 to January 1977
Enumerated_Domain_Value_Definition_Source: Source report
Enumerated_Domain:
Enumerated_Domain_Value: K
Enumerated_Domain_Value_Definition: R/V Catalyst, March 1972 to October 1973
Enumerated_Domain_Value_Definition_Source: Source report
Enumerated_Domain:
Enumerated_Domain_Value: ER
Enumerated_Domain_Value_Definition: R/V Catalyst, June 1973
Enumerated_Domain_Value_Definition_Source: Source report
Enumerated_Domain:
Enumerated_Domain_Value: HSU
Enumerated_Domain_Value_Definition: R/V Catalyst, October 1976
Enumerated_Domain_Value_Definition_Source: Source report
Attribute:
Attribute_Label: Sampler
Attribute_Definition: Sampler type
Attribute_Definition_Source: Source report
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: SM
Enumerated_Domain_Value_Definition: Smith-MacIntyre grab sampler
Enumerated_Domain_Value_Definition_Source: Source report
Enumerated_Domain:
Enumerated_Domain_Value: SH
Enumerated_Domain_Value_Definition: Shipek grab sampler
Enumerated_Domain_Value_Definition_Source: Source report
Enumerated_Domain:
Enumerated_Domain_Value: SD
Enumerated_Domain_Value_Definition: Sediment dredge
Enumerated_Domain_Value_Definition_Source: Source report
Enumerated_Domain:
Enumerated_Domain_Value: GC
Enumerated_Domain_Value_Definition: Gravity core
Enumerated_Domain_Value_Definition_Source: Source report
Attribute:
Attribute_Label: Water depth
Attribute_Definition: Water depth
Attribute_Definition_Source: Source report
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 7
Range_Domain_Maximum: 187
Attribute_Units_of_Measure: Meters
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: Mode
Attribute_Definition: Mode of grainsize distribution
Attribute_Definition_Source: Source report
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1.8
Range_Domain_Maximum: 7.0
Attribute_Units_of_Measure: Phi
Attribute_Measurement_Resolution: 0.1
Attribute:
Attribute_Label: Median
Attribute_Definition: Median grainsize
Attribute_Definition_Source: Source report
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.65
Range_Domain_Maximum: 8.32
Attribute_Units_of_Measure: Phi
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: Mean
Attribute_Definition: Mean grainsize
Attribute_Definition_Source: Inman, 1952
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1.66
Range_Domain_Maximum: 8.68
Attribute_Units_of_Measure: Phi
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: Sorting
Attribute_Definition: Standard deviation of grainsize
Attribute_Definition_Source: Inman, 1952
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.29
Range_Domain_Maximum: 3.31
Attribute_Units_of_Measure: Phi
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: Skewness
Attribute_Definition: Skewness of grainsize
Attribute_Definition_Source: Inman, 1952
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -0.41
Range_Domain_Maximum: 0.95
Attribute_Units_of_Measure: Unitless
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: Kurtosis
Attribute_Definition: Kurtosis of grainsize distribution
Attribute_Definition_Source: Inman, 1952
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.43
Range_Domain_Maximum: 4.82
Attribute_Units_of_Measure: Unitless
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: Light minerals
Attribute_Definition: Minerals with density < 2.96 g/cm3
Attribute_Definition_Source: Source report
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 89.69
Range_Domain_Maximum: 99.52
Attribute_Units_of_Measure: Percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: Light heavy minerals
Attribute_Definition: Minerals with density > 2.96 g/cm3 and < 3.32 g/cm3
Attribute_Definition_Source: Source report
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.33
Range_Domain_Maximum: 9.85
Attribute_Units_of_Measure: Percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: Heavy heavy minerals
Attribute_Definition: Minerals with density > 3.32 g/cm3
Attribute_Definition_Source: Source report
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.1
Range_Domain_Maximum: 4.86
Attribute_Units_of_Measure: Percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: Gravel
Attribute_Definition: Amount of gravel in sample
Attribute_Definition_Source: Wentworth 1938
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 1.66
Attribute_Units_of_Measure: Percent
Attribute_Measurement_Resolution: 0.1
Attribute:
Attribute_Label: Sand
Attribute_Definition: Amount of sand in sample
Attribute_Definition_Source: Wentworth 1938
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.32
Range_Domain_Maximum: 96.73
Attribute_Units_of_Measure: Percent
Attribute_Measurement_Resolution: 0.1
Attribute:
Attribute_Label: Silt
Attribute_Definition: Amount of silt in sample
Attribute_Definition_Source: Wentworth 1938
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1.82
Range_Domain_Maximum: 84.52
Attribute_Units_of_Measure: Percent
Attribute_Measurement_Resolution: 0.1
Attribute:
Attribute_Label: Clay
Attribute_Definition: Amount of clay in sample
Attribute_Definition_Source: Wentworth, 1938
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1.45
Range_Domain_Maximum: 41.2
Attribute_Units_of_Measure: Percent
Attribute_Measurement_Resolution: 0.0001

Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: University of Washington
Contact_Address:
Address_Type: Mail
Address: P.O. Box 357940
Address: University of Washington
City: Seattle
State_or_Province: WA
Postal_Code: 98195
Contact_Voice_Telephone: 206-543-5060
Resource_Description: Borgeld_PhD_1985
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 and the University of Washington.
Fees: None
Technical_Prerequisites: None
Available_Time_Period:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1985

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.


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