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Seismotectonic maps in the vicinity of the lower Wabash Valley,Illinois, Indiana, and Kentucky - Digital Spatial Database:Paleoliquefaction locations observed in 1995 in Illinois


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2013-05-16 14:07:50


The northern part of the map area and large adjacent regions havebeen severely shaken by one or more moderate to large prehistoricearthquakes. The evidence of these takes the form ofpaleoliquefaction features, including shaking-induced sandblows anddikes that fed them.Over several summer field seasons from 1990 through 1994,several workers searched ditches and river banks for evidenceof liquefaction. They found numerous dikes and sandblows.This database includes the locations and descriptions of dikes theyobserved and measured.The most widespread paleoliquefaction is attributed to amid-Holocene earthquake near what is now Vicennes, IN, with anestimated moment- magnitude of about 7.5. Stratigraphic,geomorphological, pedological, archealogical, [...]


Point of Contact :
Susan Rhea
Process Contact :
Susan Rhea
Distributor :
Susan Rhea
Metadata Contact :
Peter N Schweitzer
Originator :
Rhea, Susan

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The data was generated to help in understanding the seismotectonic hazardsin the vicinity of the lower Wabash Valley. This data complements similardata collected in the vicinity of New Madrid, MO(US Geological Survey Open-File Report 95-0574, available via ftp at<>)

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