Dissertation/Thesis Abstract

Paleoenvironmental reconstruction by identification of glacial cave deposits, Helderberg Plateau, Schoharie County, New York
by Weremeichik, Jeremy M., M.S., Mississippi State University, 2013, 191; 1536097
Abstract (Summary)

Eight dissolution caves from the Helderberg Plateau in Schoharie County, New York were studied to investigate unusual sediment packages previously interpreted to be deposits laid down during stagnant ice-cover conditions of the Wisconsin glaciation. The sediment package, consisting of white finely laminated silts and clays are overlain by coarse gravels, in turn overlain by dark silts and clays. Analysis of 63 sediment samples was inconclusive in terms of organic content, but indicated a higher degree of fine-grained calcite material in the white clays than in the overlying units. The caves with the white clays exist only within the footprint of Glacial Lake Schoharie, with lower elevation caves containing a thicker white clay sequence, a measure of the duration of lake cover. The sediment sequence represents glacial rock flour formed under stagnant lake conditions, overlain by outwash deposits emplaced during lake termination, and more recent sediment from soil-loss deposition.

Indexing (document details)
Advisor: Mylroie, John E.
Commitee: Clary, Renee M., Schmitz, Darrel W.
School: Mississippi State University
Department: Geosciences
School Location: United States -- Mississippi
Source: MAI 51/05M(E), Masters Abstracts International
Subjects: Geology, Paleoecology, Geomorphology
Keywords: Glacial Lake Schoharie, Glacial deposits, Glaciolacustrine, Helderberg Plateau
Publication Number: 1536097
ISBN: 978-1-303-03714-6
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