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| Jeffersonville Limestone | |
|---|---|
| Name | Jeffersonville Limestone |
| Type | Formation |
| Period | Middle Devonian |
| Primary lithology | Limestone, dolostone |
| Other lithology | Shale, marl |
| Namedfor | Jeffersonville, Indiana |
| Region | Ohio Valley, United States |
| Country | United States |
Jeffersonville Limestone The Jeffersonville Limestone is a Middle Devonian carbonate formation known for its diverse fossil assemblages and regional importance in the stratigraphy of the Ohio Valley. It has been studied in the contexts of paleontology, sedimentology, and regional mapping by workers associated with institutions such as the Smithsonian Institution, Yale University, Harvard University, University of Chicago, and the Ohio Geological Survey. Its exposures have informed correlations used by the United States Geological Survey, Indiana Geological and Water Survey, and numerous university departments.
The Jeffersonville unit consists predominantly of gray to tan bioclastic limestone and dolostone interbedded with shaly zones and argillaceous marl that record carbonate platform deposition. Field descriptions by geologists from Princeton University, Cornell University, University of Michigan, Purdue University, and Kent State University emphasize bedded packstone and grainstone fabrics, with common peloids, crinoid debris, and stromatoporoid fragments. Petrographic work undertaken at laboratories linked to Massachusetts Institute of Technology, University of Illinois Urbana-Champaign, Indiana University Bloomington, and the University of Kentucky documents micritic matrices, sparry calcite cement, and secondary dolomitization influenced by burial diagenesis. Geochemical analyses published by teams from Los Alamos National Laboratory and Oak Ridge National Laboratory include stable isotope studies that compare carbon and oxygen signatures with coeval units such as the Hamilton Group and the Wapsipinicon Group.
Biostratigraphic and conodont zonation places the Jeffersonville in the Middle Devonian (Eifelian to Givetian) and correlates it to regional units studied by stratigraphers at Columbia University, University of Pennsylvania, University of Wisconsin–Madison, and University of Toronto. Sequence stratigraphy work by researchers affiliated with Stanford University, University of California, Berkeley, and Imperial College London situates it within shelf carbonate depositional cycles overlain and underlain by shaly and reefal formations including equivalents tied to the Devonian reef complexes recognized in North America and Europe. Regional mapping by agencies such as the Michigan Geological Survey and the Kentucky Geological Survey refines thickness and facies changes across structural elements like the Cincinnati Arch and the Findlay Arch, features long studied by geoscientists from University of Cincinnati and Ohio State University.
Exposures occur across parts of Indiana, Kentucky, Ohio, and Michigan, with notable roadcuts, quarries, and riverbanks near Jeffersonville, Indiana, the Ohio River, the Wabash River, and tributaries mapped during surveys by the Indiana Department of Natural Resources and the U.S. Army Corps of Engineers. Classic outcrops at quarries and natural cliffs have been documented in field guides produced by Geological Society of America, Paleontological Association, and regional societies like the Indiana Academy of Science. Correlation with subsurface data from petroleum and mineral exploration records maintained by Marathon Oil, ExxonMobil, and regional agencies provides broader distributional control beyond surface exposures.
The formation is fossiliferous, yielding diverse faunas including brachiopods, bryozoans, corals, stromatoporoids, crinoids, trilobites, conodonts, and mollusks; collections reside in museums such as the Field Museum, American Museum of Natural History, Natural History Museum, London, and the Carnegie Museum of Natural History. Taxonomic work by paleontologists at University of Kansas, University of Iowa, University of Cincinnati, and Ohio State University has documented genera comparable to those in the Hamilton Group and European Devonian faunas cataloged by researchers from University of Edinburgh and Natural History Museum, Paris. Notable fossil localities have been the focus of studies and exhibits curated by the Indiana State Museum and academic monographs from authors affiliated with University of Texas at Austin and University of Michigan.
Interpretations place deposition on a shallow to moderately deep carbonate shelf affected by episodic storm events, reef growth, and relative sea-level fluctuations tied to Middle Devonian eustatic cycles recognized in global syntheses by the International Commission on Stratigraphy, Geological Society of America, and International Union of Geological Sciences. Paleogeographic reconstructions developed by teams at University of Southern California, University of California, Santa Barbara, Dalhousie University, and University of Alberta depict the region as a tropical to subtropical shelf margin within the Rheic Ocean realm during the Devonian, correlating with reef belts studied in Germany, Poland, and Belgium by European paleontologists.
The Jeffersonville Limestone has been quarried for aggregate, dimension stone, and lime, utilized in construction projects documented by agencies such as the Indiana Department of Transportation and companies like Vulcan Materials Company and LafargeHolcim. Engineering studies for foundations, tunneling, and road construction by consultants and university engineering departments at Purdue University and Virginia Tech assess strength, porosity, and weathering characteristics; these influence design standards adopted by municipal authorities and the Federal Highway Administration. Hydrogeologic evaluations by the United States Geological Survey and state water surveys examine aquifer properties where fractured and karstic zones affect groundwater flow.
The unit was first described in the 19th century around communities such as Jeffersonville, Indiana and documented in early geological surveys led by figures associated with institutions like the New York State Geological Survey and the Geological Survey of Ohio. Subsequent detailed stratigraphic and paleontological investigations were advanced by researchers from Yale University, Harvard University, University of Chicago, and state geological surveys, with monographs and bulletins distributed through the Geological Society of America and university presses. Collections and type sections have been curated at repositories including the Smithsonian Institution and university museums, forming the basis for ongoing taxonomic, sedimentologic, and regional correlation studies.
Category:Devonian geology