Date of Award
Master of Science
Roy B Van Arsdale
David N Lumsden
Randel T Cox
Ryan M Csontos
The New Madrid seismic zone had at least three M>7 earthquakes during the winter of 1811-1812, but its faults are poorly mapped. This project interprets 517, 300-foot-deep, well logs in southeastern Missouri and identifies extensions of the Reelfoot and New Madrid North fault zones. The Lilbourn uplift, a western extension of the Reelfoot fault, is a subsurface high with 100 feet of relief on Pleistocene river gravels that continues 9 miles west from New Madrid, Missouri. The 19 mile long Charleston uplift, which passes from near Farrenburg, Missouri, to Cairo, Illinois, is a N46°E trending subsurface Flour Island Formation clay ridge with 120 feet of relief. This uplift is interpreted to be a positive flower structure that may have Quaternary displacement. The Charleston uplift appears to be a northeastern extension of the New Madrid North fault that may locally correspond with the Western Reelfoot Rift Margin fault zone.
Dissertation or thesis originally submitted to the local University of Memphis Electronic Theses & dissertation (ETD) Repository.
Pryne, Daniel Erik, "Stratigraphic and Structural History of Shallow Mississippi Embayment Sediments in Southeastern Missouri" (2012). Electronic Theses and Dissertations. 508.