Electronic Theses and Dissertations

Identifier

618

Date

2012

Document Type

Thesis

Degree Name

Master of Science

Major

Earth Sciences

Concentration

Geology

Committee Chair

Roy B Van Arsdale

Committee Member

David N Lumsden

Committee Member

Randel T Cox

Committee Member

Ryan M Csontos

Abstract

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.

Comments

Data is provided by the student.

Library Comment

Dissertation or thesis originally submitted to the local University of Memphis Electronic Theses & dissertation (ETD) Repository.

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