Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Depth to magnetic rocks

Online link https://geo-nsdi.er.usgs.gov/metadata/open-file/97-681/magdep.faq.html
Description The structure of and depth to the floor of the Mississippi Valley and Rough Creel Grabens and surrounding regions were interpreted from aeromagnetic data. This cover contains the depth contours for the region within this study area and was clipped from th
Originators Rhea, Susan
Publication U.S. Geological Survey Open-File Report 97-0681

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States or counties

LITHM.PAT

Geologic map units

Label Definition
LITHOLOGY Map unit lithology

LITHIM.PAT

Geologic map units at specific locations (same attributes as polygon coverage LITHIM.PAT)

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STATE-INT.PAT

State boundaries

Label Definition
ST State abbreviation