The stratigraphy and sedimentology of carbonate shelf deposits of the Ordovician Trenton Group exposed in the Mohawk Valley of Central New York are well documented. A similar level of detail for the laterally equivalent and overlying Utica Shale in the region is lacking. This is due to the more enigmatic nature of mudstones, and difficulties of observing fine sedimentary structures and layering in weathered outcrop exposures. The recent availability of numerous slabbed drill cores through these strata presents an unparalleled opportunity to study the Utica Shale in a high level of detail for the first time. Fine-scale observations, in addition to XRF spectroscopy and rock hardness analysis, for the Utica Shale and Dolgeville Formation have revealed new sedimentary features, depositional sequences, and geochemical variability.
Five unique lithofacies have been defined based on lithology and sedimentary and biogenic structures. They reflect a variety of transport and depositional processes, including turbidity currents, debris flows, contour currents, and wave reworking; in addition to low energy suspension settling of mud. Far from a monotonous interval of mudstones, the Utica Shale in Central New York reflects deposition in a dynamic marine environment that was shallow enough to allow for wave and current reworking of sediment, as well as mixing of oxygenated surface waters with more anoxic bottom waters. Subtle changes in bulk rock elemental concentrations through the Utica Shale and Dolgeville Formation are the result of changing source terrains, sedimentation rate, benthic redox conditions, and tephra deposition.
|Commitee:||Demicco, Bob, Graney, Joseph|
|School:||State University of New York at Binghamton|
|Department:||Geological Sciences and Environmental Studies|
|School Location:||United States -- New York|
|Source:||MAI 57/01M(E), Masters Abstracts International|
|Keywords:||Foreland, Mudstone, Ordovician, Shale, Taconic, Utica|
Copyright in each Dissertation and Thesis is retained by the author. All Rights Reserved
The supplemental file or files you are about to download were provided to ProQuest by the author as part of a
dissertation or thesis. The supplemental files are provided "AS IS" without warranty. ProQuest is not responsible for the
content, format or impact on the supplemental file(s) on our system. in some cases, the file type may be unknown or
may be a .exe file. We recommend caution as you open such files.
Copyright of the original materials contained in the supplemental file is retained by the author and your access to the
supplemental files is subject to the ProQuest Terms and Conditions of use.
Depending on the size of the file(s) you are downloading, the system may take some time to download them. Please be