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Bartholomew, Alexander
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Spring 2025
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2025-05
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Rosner_Honors.pdf
Adobe PDF, 15.99 MB
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This paper will describe fauna seen in the Port Jervis Formation, located near the New York and New Jersey Border. The lithology of the Port Jervis Formation is an argillaceous limestone, including a trilobite-rich bed containing the index fossil Nanothyris subglobosa. The Port Jervis Formation sits on top of the Port Ewen Formation and below the Glenerie Formation, all being Lower Devonian in age. There is a major unconformity called the Wallbridge Unconformity that is in between the Port Jervis and the Glenerie. There is exceptional fossil preservation in the Port Jervis Formation, containing multitudes of brachiopods and trilobites. These fossil specimens will be reclassified, along with prepared and drawn in order to better understand their taxonomy and morphology. Methods used in the laboratory include preparing fossil specimens and dissolving carbonate rocks for conodonts. This paper aims to describe the events that deposited these formations and describe fossil specimens.
Key words: geology, Devonian, paleontology, Port Jervis Formation, trilobite, brachiopod
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