"Megascopic examination of diamond-drill cores supplemented by insoluble residue data provides a usable means of studying the lithologic characteristic of Upper Cambrian strata in the subsurface of western Missouri.
The stratigraphic relationships within each Cambrian formation and the relationships of each Cambrian unit to formations above and below are discussed.
The relationship of Upper Cambrian strata to the Precambrian surface in western Missouri and easternmost Kansas is illustrated. The Lamotte Sandstone is overlapped by the Reagan Sandstone against Precambrian topographic highs and the Bonneterre and lower Davis are replaced by sandstones similar to the Reagan in southwest Missouri and southeast Kansas. Northward, in western Missouri, from Jasper County to Bates County the Bonneterre and lower Davis (?) is absent and in easternmost Kansas the Lamotte, Bonneterre, and Davis Formations have been overlapped by the Derby-Doerun Dolomite.
All Upper Cambrian formations thin westward, away from the St. Francois Mountains, across the study area. However, pre-Derby-Doerun units thin more rapidly than do the Derby-Doerun, Potosi, or Eminence Formations.
The areal extent of the Sullivan Siltstone and the Whetstone Creek Members of the Bonneterre Formation in the central and western portions of southern Missouri has been determined and the westward extent of the Whetstone Creek Member is believed to represent an erosional surface on the top of the Bonneterre.
The "green clay residue facies" and the "spongy chert residue facies" occur by facies substitution with more typical, chert-bearing Potosi and Eminence Dolomites. Although the reasons for these residue facies in the Potosi and Eminence are not fully known at this time, the areal distribution of these units in the study area have been determined"--Abstract, pages ii-iii.
Beveridge, Thomas R. (Thomas Robinson), 1918-1978
Spreng, Alfred C., 1923-2012
Rockaway, John D.
Geosciences and Geological and Petroleum Engineering
M.S. in Geology
University of Missouri--Rolla
vi, 130 pages
© 1974 Joseph L. Thacker, Jr., All rights reserved.
Thesis - Open Access
Geology, Structural -- Missouri
Geology, Stratigraphic -- Cambrian
Formations (Geology) -- Missouri
Print OCLC #
Electronic OCLC #
Link to Catalog Record
Thacker, Joseph L. Jr., "A study of the subsurface stratigraphy of the upper Cambrian in Western Missouri" (1974). Masters Theses. 3453.