Dataset Identification:
Resource Abstract:
- description: This cover contains structure contours of the elevations of the unconformity at the Cambrian-Precambrian 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.; abstract: This cover contains structure contours of the elevations of the unconformity at the Cambrian-Precambrian
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.
Citation
- Title Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database:
Structure contours on Cambrian-Precambrian unconformity.
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- creation Date
2018-06-08T08:39:45.653890
Resource language:
Processing environment:
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Metadata data stamp:
2018-08-06T23:01:24Z
Resource Maintenance Information
- maintenance or update frequency:
- notes: This metadata record was generated by an xslt transformation from a dc metadata record; Transform by Stephen M. Richard, based
on a transform by Damian Ulbricht. Run on 2018-08-06T23:01:24Z
Metadata contact
-
pointOfContact
- organisation Name
CINERGI Metadata catalog
-
- Contact information
-
-
- Address
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- electronic Mail Address cinergi@sdsc.edu
Metadata language
eng
Metadata character set encoding:
utf8
Metadata standard for this record:
ISO 19139 Geographic Information - Metadata - Implementation Specification
standard version:
2007
Metadata record identifier:
urn:dciso:metadataabout:69dbb959-b61d-46cd-b3b0-77d41dd01a8e
Metadata record format is ISO19139 XML (MD_Metadata)