New insights into Middle Pennsylvanian stratigraphy in Indiana and Southern Illinois have been uncovered through extensive investigations of coal mines, borehole records, and conodont studies. Key findings include the identification of regionally continuous formations like the Stonefort Limestone an

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This study by Jacob Dyson, Susan Rimmer, and Scott Erick explores the geochemistry and organic petrology of the Pennsylvanian Anna Shale in Southwestern Illinois. The research aims to assess source-rock quality, determine organic matter sources, evaluate paleo-redox conditions, and investigate trace

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