Metadata:
Identification_Information:
Citation:
Citation_Information:
Originator: Rhea, Susan
Publication_Date: 1997
Title:
Seismotectonic maps in the vicinity of the lower Wabash Valley, IL,
IN, and KY - Digital Spatial Database: structure contours on
Cambrain-Precambrain unconformity
Geospatial_Data_Presentation_Form: map
Series_Information:
Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: 97-0681
Publication_Information:
Publication_Place: Denver, CO
Publisher: U.S. Geological Survey
Online_Linkage: <URL:ftp://greenwood.cr.usgs.gov/pub/open-file-reports/ofr-97-0681>
Description:
Abstract:
This cover contains structure contours of the elevations of the
unconformity at the Cambrian-Precambrain boundary.
These data were contributed by
Glenn Bear of Indiana University as part of the work on
his doctoral thesis. The southern part of the map was produced by
James Drahovzal of the Kentucky Geological Survey and merged with
Bear's map of the rest of the map area and beyond. Use of public and
proprietary seismic
reflection and well data were used to define the
structure. Units are in thousands of feet below sea level.
A prominent east-west structure in the southern half of the map
area is the western end of the Rough Creek Graben. At its deepest
point the unconformity is more than 30,000 ft
(9,100 m) below sea level. Faulted strata at this depth mean that
the Rough Creek Fault System penetrates to hypocentral depths.
At the western edge of the map area, the graben bends to the
southwest into the Reelfoot Rift and becomes more shallow. North of
the Rough Creek Graben, and extending northward along the Wabash
River, is the Wabash Valley Fault System. This fault system cuts an
elliptical low in the unconformity. Some of the structure contours
show horizontal offsets at depths that are opposite to the offsets
expected from the known normal slip on the faults. Some authors
interpret this as evidence of strike slip motion on these faults.
This cover contains all the contours including the extents outside
the map area. "bcontours" is clipped to the map area.
Purpose:
The data was generated to help in understanding the seismotectonic
hazards in the vicinity of the lower Wabash Valley. This data
complements similar data collected in the vicinity of New Madrid, MO
(US Geological Survey Open-File Report 95-0574, available via ftp at
<ftp://greenwood.cr.usgs.gov/pub/open-file-reports/ofr-95-0574>)
Time_Period_of_Content:
Currentness_Reference:
This is the most recent interpretation of the structure of the
Cambrian-Precambrian unconformity in the map area (1997).
Time_Period_Information:
Single_Date/Time:
Calendar_Date: Cambrian-Precambrian
Status:
Progress: complete
Maintenance_and_Update_Frequency: none planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -89
East_Bounding_Coordinate: -87
North_Bounding_Coordinate: 39
South_Bounding_Coordinate: 36.5
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Precambrian contours
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Wabash Valley
Access_Constraints: none
Use_Constraints: none
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Susan Rhea
Contact_Organization: US Geological Survey
Contact_Position: Geophysicist
Contact_Address:
Address_Type: mailing address
Address: MS966, Box 25046, Federal Center
City: Denver
State_or_Province: CO
Postal_Code: 80225
Country: USA
Contact_Voice_Telephone: 303-273-8639
Contact_Facsimile_Telephone: 303-273-8600
Contact_Electronic_Mail_Address: rhea@usgs.gov
Contact_Instructions: email is the best way to make contact
Native_Data_Set_Environment: SunOS, 5.5.1, sun4u UNIX, ARC/INFO version 7.1.1
Cross_Reference:
Citation_Information:
Originator:
Wheeler, Russell L., Susan Rhea, Sharon F. Diehl, James A. Drahovzal,
Glenn W. Bear, and Michael L. Sargent
Publication_Date: 1997
Title:
Seismotectonic map showing faults, igneous rocks, and geophysical and
neotectonic features in the vicinity of the lower Wabash Valley, IL,
IN, and KY
Geospatial_Data_Presentation_Form: map
Series_Information:
Series_Name: U.S. Geological Survey I-Map
Issue_Identification: I-2583-D
Publication_Information:
Publication_Place: Denver, CO
Publisher: U.S. Geological Survey
Other_Citation_Details: pamphlet accompanies map
Online_Linkage: <URL:ftp://greenwood.cr.usgs.gov/ofr>
Data_Quality_Information:
Completeness_Report: data contains all contours and depths
Logical_Consistency_Report: Chain-node topology present.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Bear, G.W., and Drahovzal, J.A.
Publication_Date: written communication
Geospatial_Data_Presentation_Form: map at 1:250,000 and digital files
Other_Citation_Details:
Bear mapped structure in the northern part of the map area for his
dissertation at Indiana University. Drahovzal mapped structure in
the southern part for a planned Kentucky Geological Survey map. Bear
combined both maps into one and sent us the digital files.
Source_Scale_Denominator: 250000
Type_of_Source_Media: paper, electronic mail system
Source_Time_Period_of_Content:
Source_Currentness_Reference:
This dataset contains information about the structure of the Cambrian-
Precambrian unconformity in the map area. This source
reference, and an as yet unpublished Doctoral Thesis from Indiana
University, are the most up-to-date interpretations of this geologic
unconformity.
Source_Contribution:
authors sent digital coordinates of contours via email and paper
copy of map with depth contours via surface mail.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Bear, G.W., Rupp, J.A., and Rudman, A.J.
Publication_Date: 1997
Title:
Seismic interpretation of the deep structure of the Wabash Valley
Fault System
Geospatial_Data_Presentation_Form: text
Series_Information:
Series_Name: Seis. Res. Letters
Issue_Identification: 68/4
Publication_Information:
Publisher: Seis. Soc. America
Other_Citation_Details:
p 624-640. This paper discusses only the
north-central part of the map area.
Process_Step:
Process_Description:
Coordinates of contour lines were received via
ftp, and a paper map was received via surface mail. Contour lines
were converted to an arcinfo coverage and depth values were added
by hand while comparing lines on the paper map to the digital view.
Values assigned to contour lines were reviewed by Bear. Clipped from
bcontours_all.
Process_Date: 19970730
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: 35
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 413
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 0
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Geographic_Coordinate_Units: Decimal Degrees
Geodetic_Model:
Horizontal_Datum_Name: Unknown
Ellipsoid_Name: Clarke 1866
Semi-major_Axis: 6378206.4
Denominator_of_Flattening_Ratio: 294.98
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: BCONTOURS.PAT
Entity_Type_Definition: attributes of point symbols
Entity_Type_Definition_Source: Rhea
Attribute:
Attribute_Label: SYMBOL
Attribute_Definition: code for symbol used to plot syncline, anticline features
Attribute_Definition_Source: Rhea
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 120
Enumerated_Domain_Value: 121
Enumerated_Domain_Value: 122
Enumerated_Domain_Value: 124
Entity_Type:
Entity_Type_Label: BCONTOURS.AAT
Entity_Type_Definition: attributes of contour lines
Entity_Type_Definition_Source: Rhea, Bear
Attribute:
Attribute_Label: DEPTH
Attribute_Definition: depth to Cambrain-PreCambrian unconformity, in thousands feet below sea level
Attribute_Definition_Source: Bear
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -30
Range_Domain_Maximum: -6
Attribute_Units_of_Measure: thousands of feet below sea level
Attribute_Measurement_Resolution: 1
Attribute:
Attribute_Label: SYMBOL
Attribute_Definition: code for symbol used to plot contours
Attribute_Definition_Source: Rhea
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 202
Enumerated_Domain_Value: 203
Enumerated_Domain_Value: 204
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Susan Rhea
Contact_Organization: US Geological Survey
Contact_Position: Geophysicist
Contact_Address:
Address_Type: mailing address
Address:
USGS Mail Stop 966
Box 25046, Federal Center
City: Denver
State_or_Province: CO
Postal_Code: 80225-0046
Country: USA
Contact_Voice_Telephone: 303-273-8639
Contact_Facsimile_Telephone: 303-273-8600
Contact_Electronic_Mail_Address: rhea@usgs.gov
Contact_Instructions: Email is the best way to make contact.
Resource_Description: USGS Open-File Report 97-0681
Distribution_Liability:
This report is preliminary and has not been reviewed for
conformity with U.S. Geological Survey editorial standards
and stratigraphic nomenclature. Any use of trade names is
for descriptive purposes only and does not imply endorsement
by the USGS.
Technical_Prerequisites: ARC/INFO version 7.0.3 or later or ArcView 3.0 or later
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ARCE
Format_Version_Number: 7.0.3
Format_Information_Content: Each coverage contains isoseismal data for one event (two for i187609)
File_Decompression_Technique: Files may be compressed with gzip; use gzip -d or gunzip to uncompress.
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: ftp://greenwood.cr.usgs.gov/pub/open-file-reports/ofr-97-0681/e00_files/bcontours_all.e00
Online_Computer_and_Operating_System: Data General AViiON 6220 running DG/UX 5.4R3.10 (Unix)
Fees: none
Metadata_Reference_Information:
Metadata_Date: 19980506
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Susan Rhea
Contact_Organization: US Geological Survey
Contact_Position: Geophysicist
Contact_Address:
Address_Type: mailing address
Address: MS966, Box 25046, Federal Center
City: Denver
State_or_Province: CO
Postal_Code: 80225
Country: USA
Contact_Voice_Telephone: 303-273-8639
Contact_Facsimile_Telephone: 303-273-8600
Contact_Electronic_Mail_Address: rhea@usgs.gov
Contact_Instructions: email is the best way to make contact
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: 19940608