Erosional Scarps from Ground Penetrating Radar showing 5KA Subduction Zone Earthquake History, WA/OR, USA

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Metadata:
Identification_Information:
Citation:
Citation_Information:
Originator: Portland State University, Department of Geology
Publication_Date: Unpublished material
Title:
Erosional Scarps from Ground Penetrating Radar showing 5KA Subduction Zone Earthquake History, WA/OR, USA
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place: Portland, OR, USA
Publisher: Portland State University
Other_Citation_Details:
Curt Peterson (1), Harry M. Jol (2), David Percy (1) 1) Department of Geology, Portland State University, Portland OR, 97201 Geography, University of Wisconsin-Eau Claire, Eau Claire, WI; Major support for this project comes from the Southwest Washington Coastal Erosion Study-US Geological Survey (USGS). Further support comes from Sensors and Software, University of Wisconsin-Eau Claire and Portland State University.
Online_Linkage: nwdata.geol.pdx.edu
Description:
Abstract:
Erosional Scarps were identified on Ground Penetrating Radar profiles (see GPR metadata) in order to determine if a coherent sequence of erosional lag deposits could be identified within 4 littoral sub-cells and within the entire Columbia River littoral cell. Lag deposits were ground-truthed periodically by coring into the beach deposits to verify the presence of heavy lag materials. The scarp sequence, along with carbon 14 dating, was then used to spatially constrain the location of continuous foredune ridges within littoral cell and sub-cells.
Purpose:
The primary purpose of this work is to determine the geologic-scale beach accretion rate. This can be compared to historic-scale and decadal scale rates. A secondary purpose is to examine foredune ridge occurence and the temporal relationship to large magnitude subduction zone earthquakes.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19980601
Ending_Date: 20020415
Currentness_Reference: Publication Date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -124.3
East_Bounding_Coordinate: -123.890000
North_Bounding_Coordinate: +47.3
South_Bounding_Coordinate: +46.000000
Keywords:
Theme:
Theme_Keyword_Thesaurus: Tri - Service Spatial Data Standard
Theme_Keyword: Geology
Theme_Keyword: Coastal Deposition
Theme_Keyword: ground penetrating radar
Theme_Keyword: earthquake
Theme_Keyword: subduction zone
Theme_Keyword: foredune ridge
Place:
Place_Keyword_Thesaurus: Geographic Names Information System
Place_Keyword: Washington
Place_Keyword: Oregon
Temporal:
Temporal_Keyword_Thesaurus: None
Temporal_Keyword: 5000ka
Temporal_Keyword: 5000bc
Access_Constraints: None
Use_Constraints:
The authors require that they be informed of any use of this data. An email to the contact person is appropriate for this purpose, a response should be received before proceeding.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: David Percy
Contact_Organization: Portland State University, Dept of Geology
Contact_Position: GIS Manager
Contact_Address:
Address_Type: mailing and physical address
Address:
Portland State University Department of Geology Room 17 Cramer Hall 1721 SW Broadway
City: Portland
State_or_Province: OR
Postal_Code: 97201
Country: USA
Contact_Voice_Telephone: 503-725-3373
Contact_Facsimile_Telephone: 503-725-3025
Contact_Electronic_Mail_Address: percyd@pdx.edu
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
GPR scarps attributes are assigned based on morphology of scarp, sequence along profile and observed temporal groupings.
Logical_Consistency_Report:
All data sets within this report are logically consistent, particularly in regard to the temporal domain. That is, dunerige timelines do not cross scarp timelines. Care must be taken (see geologic report) with the C14 interpretations.
Completeness_Report:
Data is complete at this level of detail. Further work could reveal more detail.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Location of GPR profiles is accurate for the purposes of this work. The Erosional Scarp locations are dependant on Profile accuracy, and are accurate for the purposes of this work. Profiles were "heads-up" digitized on aerial photo basemap based on field notes during the field season. Scarps were located to the closest 10m mark. Location is the inferred shoreline position, 10 - 100 m landward, from the retreat scarp position based on modern shoreface morphology.
Lineage:
Process_Step:
Process_Description:
Scarps were identified on GPR profiles on a computer monitor (Peterson and Jol). Location was noted and given to GIS Manager (Percy) for geocoding. Geocoding was accomplished by using the position along the linear profile as an "address" and using the address-matching algorithm of the GIS to generate a point file.
Process_Date: 20010915
Cloud_Cover: 0
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: Lambert Conformal Conic
Lambert_Conformal_Conic:
Standard_Parallel: 45.8333333333
Standard_Parallel: 47.3333333333
Longitude_of_Central_Meridian: -120.500000
Latitude_of_Projection_Origin: +45.333333
False_Easting: 500000
False_Northing: 0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 3
Ordinate_Resolution: 5
Planar_Distance_Units: Meters
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
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: GPR Scarps
Entity_Type_Definition: Point
Entity_Type_Definition_Source: GIS
Attribute:
Attribute_Label: Length
Attribute_Definition: Length of polyline
Attribute_Definition_Source: self
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 1000
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: GPR Name
Attribute_Definition: Name given to GPR polyline
Attribute_Definition_Source: profile names
Attribute_Domain_Values:
Unrepresentable_Domain: study-defined names
Attribute:
Attribute_Label: from3
Attribute_Definition:
Relative starting point for line. Number corresponds to number of meters from GPR profile start. If GPR profile is displayed using more than one polyline, then this number is adjusted to be the relative position of the starting point of this line, as if all lines were connected. Used by geocoding algorthm.
Attribute_Definition_Source: self
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 1000
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: To3
Attribute_Definition:
Relative ending point of line. Corresponds with number of meters from starting point of GPR profile. If GPR profile is displayed using more than one polyline, then this number will be adjusted to be the relative length, as if all lines were connected. Used by geocoding algoritm.
Attribute_Definition_Source: self
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 1000
Attribute_Units_of_Measure: meters
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: David Percy
Contact_Address:
Address_Type: mailing and physical address
Address:
Portland State University Department of Geology Room 17 Cramer Hall 1721 SW Broadway
City: Portland
State_or_Province: OR
Postal_Code: 97201
Contact_Voice_Telephone: 503-725-3373
Contact_Facsimile_Telephone: 503-725-3025
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 constitude or imply its endorsement, recommendation, or favoring by the United States Governemnt 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.
Metadata_Reference_Information:
Metadata_Date: 20010809
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: David Percy
Contact_Organization: Portland State University Department of Geology
Contact_Position: GIS Manager
Contact_Address:
Address_Type: mailing and physical address
Address:
Portland State University Department of Geology Room 17 Cramer Hall 1721 SW Broadway
City: Portland
State_or_Province: OR
Postal_Code: 97201
Country: USA
Contact_Voice_Telephone: 503-725-3373
Contact_Electronic_Mail_Address: percyd@pdx.edu
Metadata_Standard_Name:
Content Standard for Digital Geospatial Metadata ("CSDGM version 2")
Metadata_Standard_Version: FGDC-STD-001-1998

Generated by mp version 2.7.9 on Thu May 16 13:54:24 2002