Masters Theses


"Lithologic and thickness data of the Lower Ordovician rocks of the Roubidoux Formation, south central Missouri, were interpreted from sample logs. Maps included are based on structure, thickness and lateral and vertical lithologic variability. Sand distribution in the Roubidoux is represented by a "sand percentage" map, a "sand isolith" map, and a "tripartite sand distribution" map. The Roubidoux Formation consists of a sequence of dolomite, sandy dolomite, sand and chert. It is believed that the Roubidoux was deposited on a stable marine platform receiving a supply of elastics from the north and northeast. The sands were deposited by longshore or coastal currents paralleling the Roubidoux strandline in Kansas. Sand transport was greatly affected by the velocities of surface currents and water depth. Most sand accumulated along low water shoals.

The sand probably settled as broad linear ridges that underwent erosion concurrently with the deposition of these ridges, transporting the ridge sands into the lows between ridges, giving the sands a sheet-like character. Most sand is concentrated in the eastern half of the mapped area, where it is distributed throughout the formation, whereas sands in the west are concentrated in the upper third.

Detailed correlations are limited by the lack of drillholes in the region. Also, the partial or complete removal of the formation in outcrop, and the partial or complete removal of carbonate as a by-product of dissolution processes falls short providing a satisfactory data base"--Abstract, pages ii-iii.


Spreng, Alfred C., 1923-2012

Committee Member(s)

Leighly, Hollis P., 1923-2004
Rechtien, Richard D.


Geosciences and Geological and Petroleum Engineering

Degree Name

M.S. in Geology and Geophysics


Five folded maps in pockets are included here as supplementary material.


University of Missouri--Rolla

Publication Date

Summer 1983


x, 58 pages, maps

Note about bibliography

Includes bibliographical references (pages 41-42).

Geographic Coverage

Roubidoux Formation, south central Missouri

Time Period



© 1983 Michael William Harbaugh, All rights reserved.

Document Type

Thesis - Open Access

File Type




Subject Headings

Lithofacies -- Missouri
Geology -- Missouri
Geology, Stratigraphic -- Ordovician
Sand -- Missouri
Sequence stratigraphy

Thesis Number

T 4971

Print OCLC #


Electronic OCLC #


Plate_I.tif (52573 kB)
Structural Contour Map on the Base of the Roubidoux Formation

Plate_II.tif (52659 kB)
Sand Percentage Map of the Roubidoux Formation

Plate_III.tif (52986 kB)
Tripartite Sand Distribution Map combined with the Sand Isolith of the Roubidoux Formation

Plate_IV.tif (52796 kB)
Entropy Values and Lithology Map combined with the Isopach of the Roubidoux Formation

Plate_V.tif (52498 kB)
Fence Diagram of the Roubidoux Formation


Thesis Location