Event Title
Stratigraphic and Geologic History of the Point Pleasant Formation (Middle Ordovician) of Ohio and Kentucky
Presentation Type
Poster/Portfolio
Presenter Major(s)
Geology
Mentor Information
Patricia Videtich, videticp@gvsu.edu
Department
Geology
Location
Kirkhof Center KC 78
Start Date
13-4-2011 2:00 PM
End Date
13-4-2011 3:00 PM
Keywords
Environment, Physical Science
Abstract
Outcrops of the Middle Ordovician Point Pleasant Formation, composed mostly of argillaceous limestone, calcareous shales and layers of brachiopod coquina, are found in southwestern Ohio and northern Kentucky. The formation is gradationally overlain by the Upper Ordovician Kope Formation and gradationally underlain by the Middle Ordovician Lexington Limestone. Samples were collected near Brooksville and at Lower Holst Creek on Highway 9 in northern Kentucky. Multiple point counts will be done on thin sections of our samples using a petrographic microscope with emphasis on fossil assemblages and deformed calcite grains. We will be searching for crystal plastic deformation structures within the calcite grains consistent with very low temperature deformation to support the hypothesis that the deformation in the Point Pleasant Formation was caused by down slope motion of sediments in a submarine setting.
Stratigraphic and Geologic History of the Point Pleasant Formation (Middle Ordovician) of Ohio and Kentucky
Kirkhof Center KC 78
Outcrops of the Middle Ordovician Point Pleasant Formation, composed mostly of argillaceous limestone, calcareous shales and layers of brachiopod coquina, are found in southwestern Ohio and northern Kentucky. The formation is gradationally overlain by the Upper Ordovician Kope Formation and gradationally underlain by the Middle Ordovician Lexington Limestone. Samples were collected near Brooksville and at Lower Holst Creek on Highway 9 in northern Kentucky. Multiple point counts will be done on thin sections of our samples using a petrographic microscope with emphasis on fossil assemblages and deformed calcite grains. We will be searching for crystal plastic deformation structures within the calcite grains consistent with very low temperature deformation to support the hypothesis that the deformation in the Point Pleasant Formation was caused by down slope motion of sediments in a submarine setting.