Title

Petrographic Characteristics of Transgressive and Regressive Limestone of Upper-Pennsylvanian (Virgilian) Oread Cyclothem, NE Oklahoma and SE Kansas

Presenter Information

Bin Hou

Department

Geosciences and Geological and Petroleum Engineering

Major

Geological Sciences and Engineering

Research Advisor

Yang, Wan

Advisor's Department

Geosciences and Geological and Petroleum Engineering

Funding Source

Missouri S&T Opportunities for Undergraduate Research Experiences (OURE) Program

Abstract

Limestone composition and texture indicate environmental conditions during landward (transgressive) and seaward (regressive) shoreline migrations. We studied six thick regressive Plattsmouth Limestone samples and five thin transgressive Leavenworth Limestone samples at two localities ~50 km apart. Microscopically, Leavenworth samples are dominantly biomicrites with crinoid and fusulinid fragments and coated grains, 1.3 mm in size, poorly-moderately sorted, and variably skewed. Plattsmouth samples are dominantly biomicrites with phylloidal algal and brachiopod fragments and coated grains, 3.6 mm in size, poorly to very poorly sorted, and variably skewed. Leavenworth samples become coarser and more poorly-sorted upward. Plattsmouth samples become finer and better sorted upward at inner shelf, but coarsen upward at algal mound. Plattsmouth is coarser and more poorly-sorted and has less fusulinid but more algae than Leavenworth. The differences conform with a giving-up mode of deposition during Leavenworth sea-level rise and a keeping-up mode during Plattsmouth slow sea-level fall.

Biography

Bin is a senior majoring in Geology. He is an international student from China. He received a scholarship from WAAIME in 2011.

Research Category

Sciences

Presentation Type

Poster Presentation

Document Type

Poster

Location

Upper Atrium/Hallway

Presentation Date

10 Apr 2012, 9:00 am - 11:45 am

Comments

Joint project with Lu Zhu

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Apr 10th, 9:00 AM Apr 10th, 11:45 AM

Petrographic Characteristics of Transgressive and Regressive Limestone of Upper-Pennsylvanian (Virgilian) Oread Cyclothem, NE Oklahoma and SE Kansas

Upper Atrium/Hallway

Limestone composition and texture indicate environmental conditions during landward (transgressive) and seaward (regressive) shoreline migrations. We studied six thick regressive Plattsmouth Limestone samples and five thin transgressive Leavenworth Limestone samples at two localities ~50 km apart. Microscopically, Leavenworth samples are dominantly biomicrites with crinoid and fusulinid fragments and coated grains, 1.3 mm in size, poorly-moderately sorted, and variably skewed. Plattsmouth samples are dominantly biomicrites with phylloidal algal and brachiopod fragments and coated grains, 3.6 mm in size, poorly to very poorly sorted, and variably skewed. Leavenworth samples become coarser and more poorly-sorted upward. Plattsmouth samples become finer and better sorted upward at inner shelf, but coarsen upward at algal mound. Plattsmouth is coarser and more poorly-sorted and has less fusulinid but more algae than Leavenworth. The differences conform with a giving-up mode of deposition during Leavenworth sea-level rise and a keeping-up mode during Plattsmouth slow sea-level fall.