From the Cincinnati Arch to the Illinois Basin: Geological Field Excursions along the Ohio River Valley

This guidebook complements the field trips offered during the 42nd Annual Meeting of the GSA North-Central Section, held in Evansville, Indiana. Topics include analysis and correlation of Silurian depositional sequences across the Cincinnati Arch in Ohio, Kentucky, and Indiana; conodonts and Pennsylvanian stratigraphy in southwestern Indiana; relationships between tectonism, igneous activity, and fluorite mineralization within the Illinois-Kentucky Fluorite District; characteristics and origin of the highly eroded Pennsylvanian sandstones at the Garden of the Gods in Illinois; use of filled-fracture features as indicators of seismicity within the lower Wabash and Ohio River valleys; and hydrogeology of an abandoned mine site in Indiana, with applications to planning for disposal of coal-combustion products. Two chapters focus on the history of New Harmony, Indiana, which served as headquarters for the pioneering naturalists who worked to characterize and map this country's interior. Another chapter relates the history of Evansville to the availability and use of geologic materials, with discussions on the characteristics and origins of building stones, building techniques, and architectural styles. References to mining history, with respect to building stone, coal, and fluorite, are made throughout.
Aspects of Pennsylvanian stratigraphy, sedimentation, and conodonts in southwestern Indiana
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Published:January 01, 2008
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CiteCitation
Carl B. Rexroad, W. John Nelson, Penny L. Meighen, 2008. "Aspects of Pennsylvanian stratigraphy, sedimentation, and conodonts in southwestern Indiana", From the Cincinnati Arch to the Illinois Basin: Geological Field Excursions along the Ohio River Valley, Anton H. Maria, Ronald C. Counts
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Abstract
The purposes of this trip are to assist in interpreting the complexities of Pennsylvanian stratigraphy and sedimentation and to collect representative conodonts. The first stop is the West Franklin Limestone Member of the Shelburn Formation, which represents the Desmoinesian-Missourian boundary and the second is the Atokan Lead Creek Limestone Member of the Mansfield Formation. To help provide a general overview of the somewhat repetitive Pennsylvanian rock sequences in southwestern Indiana, we will visit two coal mines, each displaying several hundred feet of Desmoinesian rocks. We will be able to collect conodonts at all stops except Stop 3.
- assemblages
- biostratigraphy
- Carboniferous
- Conodonta
- field trips
- Gibson County Indiana
- Indiana
- lithostratigraphy
- Mansfield Formation
- microfossils
- mines
- North America
- Paleozoic
- Pennsylvanian
- Posey County Indiana
- road log
- Spencer County Indiana
- United States
- Shelburn Formation
- Francisco Mine
- Somerville Central Mine