Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Magnetic dikes

Online link https://geo-nsdi.er.usgs.gov/metadata/open-file/97-681/magdike.faq.html
Description Hildenbrand and Ravat (1997) inferred the locations of near-surface dikes from analyses of high-resolution aeromagnetic data. The lines represent locations of magnetic highs that they interpreted as dikes. Modeling indicates the dikes are vertical, extend
Originators Rhea, Susan
Publication U.S. Geological Survey Open-File Report 97-0681

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USGS OFR 97-0681