The geology of the Thayer area emphasizing the stratigraphy of the Cotter and the Jefferson City formations

Author

William Jesse Hedden

Abstract

"Detailed geologic mapping of the Cotter-Jefferson City formational contact in the Thayer, Missouri area demonstrates the feasibility of using this contact. This mapping also delineates significant faulting in the area.

The stratigraphy of the Cotter and Jefferson City formations in the Thayer area has been studied to find a mappable contact between the two formations. The contact was mapped in this area by using marker beds, the stratigraphic positions of which were determined by applying insoluble residue techniques to outcrop sections. Because the insoluble residue zones of the Cotter and Jefferson City formations are recognizable throughout the state of Missouri in the subsurface, mapping the contact between the formations should be possible anywhere within their outcrop area by applying the method described in this report.

Mapping has revealed three distinct zones of block faulting with vertical displacements as great as 350 feet. The faults were mapped using a combination of structural control and air-photo lineations, because the fault traces cannot usually be seen in the field. The faulting may be a southeastward extension of the Graydon Springs fault zone, or it may be part of a suspected east-west trending fault zone of regional extent. Mammoth Spring, the second largest spring in the Ozarks, rises along a fault surface and near the intersection of two fault zones"--Abstract, page ii.

Advisor(s)

Beveridge, Thomas R. (Thomas Robinson), 1918-1978

Committee Member(s)

Rockaway, John D.
Carroll, William R.

Department(s)

Geosciences and Geological and Petroleum Engineering

Degree Name

M.S. in Geology

Sponsor(s)

V. H. McNutt Memorial Foundation

Publisher

University of Missouri--Rolla

Publication Date

1968

Pagination

vii, 159 pages, 14 plates

Note about bibliography

Includes bibliographical references (pages 148-151).

Geographic Coverage

Thayer, Missouri

Rights

© 1968 William Jesse Hedden, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Subject Headings

Geology, StratigraphicGeology -- Missouri -- Thayer areaGeology -- Missouri -- Maps

Thesis Number

T 2170

Print OCLC #

6000628

Electronic OCLC #

851584152

Recommended Citation

Hedden, William Jesse, "The geology of the Thayer area emphasizing the stratigraphy of the Cotter and the Jefferson City formations" (1968). Masters Theses. 7092.
https://scholarsmine.mst.edu/masters_theses/7092