Date of this Version
UNIVERSITY OF NEBRASKA STUDIES July 1950 NEW SERIES NO.5
The present report is a physiographic and paleontologic approach to the Pleistocene history of a portion of the Elkhorn River Valley in parts of Dodge, Cuming and Stanton counties in northeastern Nebraska. The area is important for correlation of deposits between the glacial and periglacial regions. Some of the critical stratigraphic units used for correlation in the Pleistocene of these regions are present in close association with the tills and contain fossils which make possible reliable statements on contemporaneity of deposits. The subsequent geologic history and present physiographic expression of this area have been greatly controlled and influenced by the Nebraskan and Kansan tills. It is hoped that this study will form a basis for further investigation of an area for which the geology has been largely unreported. J. E. Todd in 1899 described several exposures in the vicinity of West Point which are incorporated into this report. A. L. Lugn (1935) reported a gravel pit section within the borders of this report east of Norfolk and made general comments on Pleistocene deposits along the Elkhorn River to the east. The area has not been test drilled and, therefore, subsurface information is most limited. In a few cases information from commercial water-well drillers and others has been utilized. Fortunately, the lower part of the Elkhorn drainage has been investigated and reported (Lueninghoener 1947) and this information facilitates this present work. Lueninghoener's treatment of the lower Platte River region presents the geologic information in a most satisfactory way. For this reason and because it will be convenient for future work in these contiguous areas, this report follows the general method of presentation employed in his paper.