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Lines in this cover show lineaments or boundaries of largelineaments interpreted from gravity and magnetic data. Theselineaments are thought to reflect structures in the crust that may berelated to earthquake generation or control of earthquake location.The broad Paducah gravity lineament trends southeast across the SW cornerof the map area. Hildenbrand and others (1996) have interpreted that thelineament represents numerous upper-crustal mafic intrustions.Within and west of the map area, small earthquakes are aligned withthe NE edge of the lineament and their abundance decreases abruptlyNE across the edge.The Commerce geophysical lineament trends NE across the map area.Langenheim and Hildenbrand (1997) attribute...
Tags: 1200 - Geophysics, 17025 = Clay, 17047 = Edwards, 17055 = Franklin, 17059 = Gallatin, All tags...


    map background search result map search result map Seismotectonic maps in the vicinity of the lower Wabash Valley,Illinois, Indiana, and Kentucky - Digital Spatial Database:Geophysical lineaments Seismotectonic maps in the vicinity of the lower Wabash Valley,Illinois, Indiana, and Kentucky - Digital Spatial Database:Geophysical lineaments