Event Title

Paleoecological analysis of shell beds from the Trimmers Rock Formation (Upper Devonian- Frasnian) along PA State Route 322

Presenter Information

Hannah Yaeger

Faculty Advisor

Dr. Jennifer Elick

Start Date

24-4-2018 5:00 PM

End Date

24-4-2018 6:00 PM

Description

This study involved point counting fossils in stained thin sections to determine if shell hash beds from a section of the Trimmers Rock Formation (Upper Devonian) in Central Pennsylvania could be used to identify characteristics of a paleocommunity. Near shore, proximal slope communities exhibited the greatest abundance of broken crinoids, tentaculites, and brachiopods. The deeper distal ramp environment contained the highest abundance of bryozoans, but also contained more intact pieces of crinoids, tentaculites and brachiopods. These mostly sessile, benthic filter feeding organisms were influenced by different energies in the environments like the intermittent turbidity current, as well as the occasional hyperpycnal flow.

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Apr 24th, 5:00 PM Apr 24th, 6:00 PM

Paleoecological analysis of shell beds from the Trimmers Rock Formation (Upper Devonian- Frasnian) along PA State Route 322

This study involved point counting fossils in stained thin sections to determine if shell hash beds from a section of the Trimmers Rock Formation (Upper Devonian) in Central Pennsylvania could be used to identify characteristics of a paleocommunity. Near shore, proximal slope communities exhibited the greatest abundance of broken crinoids, tentaculites, and brachiopods. The deeper distal ramp environment contained the highest abundance of bryozoans, but also contained more intact pieces of crinoids, tentaculites and brachiopods. These mostly sessile, benthic filter feeding organisms were influenced by different energies in the environments like the intermittent turbidity current, as well as the occasional hyperpycnal flow.