This paper presents the results of almost continuous research by the Nebraska State Geological Survey on Tertiary stratigraphy in Nebraska during a period of more than 10 years, with special attention to the present acceptable stratigraphie nomenclature. Cogent reasons are presented for the retention of such well-known names as White River, Arikaree, and Ogallala, all now redefined and elevated to group ranking. “Loup Fork”, “Loup River”, “Nebraska beds”, and “Republican River” are considered obsolete. The application of fossil seed zones to problems of correlation is noted. The table of Tertiary formations of Nebraska summarizes the Tertiary stratigraphy in Nebraska.

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