Recent marine sediments of the central California continental shelf between Point Lobos and Point Sur

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Herbert Palfrey Colomb, Jr.
Publication_Date: 1973
Title:
Recent marine sediments of the central California continental shelf between Point Lobos and Point Sur
Geospatial_Data_Presentation_Form: Paper
Publication_Information:
Publication_Place: Monterey, CA
Publisher: United States Naval Postgraduate School
Other_Citation_Details: Partial funding through the Office of Naval Research
Description:
Abstract:
"Seventy sediment samples were collected from the continental shelf between Pt. Lobos and Pt. Sur for textural analysis to determine their statistical properties. Based upon the parameters of mean grain-size, standard deviation, and skewness, three distinct belts of sediments were found. Along the coast the sediments were composed of medium sand-sized, moderately to well sorted particles. Down the center of the shelf a discontinuous band of fine sand occurs in the depths of 35 to 65 fm. The outer band appears to follow the break in the continental shelf and is composed of relatively coarse sediment. Two bathymetric and 3.5 kHz seismic profiling cruises were made through the area. The results of these cruises indicate that the offshore extension of the Palo Colorado fault follows a branch of the Carmel submarine canyon. The primary source of sediments appears to be weathering of coastal rock formations, with sediment distribution due to wave action."
Purpose:
"The objective of this study was to describe and explain the distribution of the recent sediments along the central California continental shelf between Point Lobos and Point Sur, California."
Supplemental_Information:
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: 1971
Currentness_Reference: Publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -122.0600
East_Bounding_Coordinate: -121.9100
North_Bounding_Coordinate: 36.5242
South_Bounding_Coordinate: 36.2717
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: U.S. Navy
Theme_Keyword: Postgraduate School
Theme_Keyword: NPS
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 Structures
Theme_Keyword: Sedimentary Textures
Theme_Keyword: Terrigenous Sediments
Place:
Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: California
Place_Keyword: Point Lobos
Place_Keyword: Point Sur
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Continental shelf
Access_Constraints: Available at the USGS library and other libraries
Use_Constraints:
Cite Herbert Palfrey Colomb, Jr. and the U.S. Naval Postgraduate School as the originators of the data.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Naval Postgraduate School
Contact_Address:
Address_Type: Physical
Address: 1 University Circle
City: Monterey
State_or_Province: CA
Postal_Code: 93943
Contact_Voice_Telephone: 831.656.2441
Browse_Graphic:
Browse_Graphic_File_Name: Colomb_MS_1973
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:
Herbert P. Colomb Jr at the United States Naval Postgraduate School for the collection and analysis of data. For inclusion into usSEABED: Digitization: Jane Reid (USGS); Formatting corrections: Jane Reid (USGS) and Chris Jenkins (University of Colorado)
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 sediment statistics.
Completeness_Report:
Digitized data include table 2 and some information in the text.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Navigation technique not noted in report. Locations given to nearest hundredth of a decimal minute.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Water depths measured by fathometer; water depths given to nearest fathom. No accuracy estimations noted in report.
Lineage:
Process_Step:
Process_Description:
Grain-size analyses were conducted in accordance with the procedures outline in Krumbein and Pettijohn (1938). Grab samples were split to obtain a representative subsample of about 250 to 300 g. The subsample was then wet-sieved through a 4.0 phi screen to separate the sand and gravel-size fractions from the silt and clay-size fractions...." The dried coarse fraction was sieved at 0.5 phi intervals in a Ro-tap for 10 minutes, and weighed to the nearest 0.1 mg. Fine fraction (< 4.0 phi) were pipetted at 0.5 interval, except those samples which contained less than 5% of the total sample weight were dried and weighed directly. Statistics were computed using a program written by W. R. Anikouchine (Dinger, 1970), including Trask, Inman, and Folk and Ward values as modified by Carter, 1971.
Source_Used_Citation_Abbreviation: Krumbein and Pettijohn, 1938
Source_Used_Citation_Abbreviation: Dinger, 1970
Process_Date: 1971
Source_Produced_Citation_Abbreviation: Colomb_MS_1973
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Naval Postgraduate School
Contact_Address:
Address_Type: Physical
Address: 1 University Circle
City: Monterey
State_or_Province: CA
Postal_Code: 93943
Contact_Voice_Telephone: 831.656.2441
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: 66
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.00017
Longitude_Resolution: 0.00017
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: Depth
Attribute_Definition: Water depth of sample
Attribute_Definition_Source: Colomb, 1973
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 36
Range_Domain_Maximum: 210
Attribute_Units_of_Measure: Meters
Attribute_Measurement_Resolution: 1.0
Attribute:
Attribute_Label: Gravel
Attribute_Definition: Gravel
Attribute_Definition_Source: Krumbein and Pettijohn, 1938
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 74.4
Attribute_Units_of_Measure: Percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: Sand
Attribute_Definition: Sand
Attribute_Definition_Source: Krumbein and Pettijohn, 1938
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 20.53
Range_Domain_Maximum: 99.46
Attribute_Units_of_Measure: Percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: Silt
Attribute_Definition: Silt
Attribute_Definition_Source: Krumbein and Pettijohn, 1938
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.23
Range_Domain_Maximum: 15.41
Attribute_Units_of_Measure: Percent
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: Mean
Attribute_Definition: Mean of grainsize distributions
Attribute_Definition_Source: Folk and Ward, 1957
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -1.69
Range_Domain_Maximum: 3.53
Attribute_Units_of_Measure: Phi
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: Dev.
Attribute_Definition: Standard deviation of grainsize distribution (sorting)
Attribute_Definition_Source: Folk and Ward, 1957
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -0.67
Range_Domain_Maximum: 0.56
Attribute_Units_of_Measure: Phi
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: Skew.
Attribute_Definition: Skewness of grainsize distribution
Attribute_Definition_Source: Folk and Ward, 1957
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.33
Range_Domain_Maximum: 3.69
Attribute_Units_of_Measure: Unitless
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: Text
Attribute_Definition: Descriptive text
Attribute_Definition_Source: Source report
Attribute_Domain_Values:
Unrepresentable_Domain: Text about the identification of gravel clasts.
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Naval Postgraduate School
Contact_Address:
Address_Type: Physical
Address: 1 University Circle
City: Monterey
State_or_Province: CA
Postal_Code: 93943
Contact_Voice_Telephone: 831.656.2441
Resource_Description: H.P. Colomb, Jr. Masters thesis, 1971
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 some 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: 536 (276) C714r
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: 1973
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.
Generated by mp version 2.8.17 on Tue May 16 20:36:12 2006