The Mississippian Borden Group (sometimes Borden Formation) is a mapped bedrock unit in Kentucky, Indiana, Illinois, Ohio, West Virginia,Matchen, D.L., and Kammer, T.W., 1994, Sequence stratigraphy of the Lower Mississippian Price and Borden Formations in southern West Virginia and eastern Kentucky: Southeastern Geology, v. 34, no. 1, p. 25–41. and Tennessee. It has many members, which has led some geologists to consider it a group (for example in IndianaShaver, R.H., Burger, A.M., Gates, G.R., Gray, H.H., and others, 1970, Compendium of rock-unit stratigraphy in Indiana: Indiana Geological Survey Bulletin, no. 43, 229 p.) rather than a formation (for example in KentuckyKepferle, R.C., 1971, Members of the Borden Formation (Mississippian) in north-central Kentucky, IN Contributions to stratigraphy, 1971: U.S. Geological Survey Bulletin, 1354-B, p. B1–B18.Weir, G.W., Gualtieri, J.L., and Schlanger, S.O., 1966, Borden Formation (Mississippian) in south- and southeast-central Kentucky, IN Contributions to stratigraphy, 1965: U.S. Geological Survey Bulletin, 1224-F, p. F1–F38. ).

Fossils Scyphozoans: Conularia sp. (from Borden Formation), Paraconularia sp. (from Coral Ridge Member, New Providence Shale)http://www.kyanageo.org/mississippian.html KYANA Geological Society (Mississippian) Hexactinellid Sponges (from Muldraugh Formation) Brachiopods: Orthotetes keokuk (from Borden Formation), Orbiculoidea (from Coral Ridge Member, New Providence Shale) Trilobite: Phillibole conkini (Coral Ridge Member, New Providence Formation, Borden Group) Cephalopods: Cantabricanites greenei, Polaricyclus ballardensis, Winchelloceras knappi (all from Coral Ridge Member, New Providence Formation, Borden Group), Muenstroceras oweni, M. parallelum, Kazakhstania colubrella, Imitoceras ixion, Masonoceras kentuckiense, Merocanites drostei, Dzhaprakoceras sp., Polaricyclus bordenensis, Winchelloceras allei (all from Nada and Cowbell Members)David M. Work and Charles E. Mason. 2003. Mississippian (Middle Osagean) Ammonoids from the Nada Member of the Borden Formation, Kentucky, Journal of Paleontology, Vol. 77, No. 3 (May, 2003), pp. 593-596 Crinoids: Pachyocrinus aequalis (from Muldraugh Mbr.), Gilmocrinus kentuckyensis (from Muldraugh Mbr.),Kammer, T.W., W. I. Ausich, and A. Goldstein. 2007. Gilmocrinus kentuckyensis n. sp. from the late Osgean (Mississippian) Muldraugh Member of the Borden Formation in Kentucky: a European immigrant originally derived from North America? Journal of Paleontology, 81:209-212. Rhodocrinites barrisi divergens, Gilbertsocrinus tuberculosus, Gilbertsocrinus typus, Actinocrinites eximius, Actinocrinites scitulus, Blairocrinus protuberatus, Steganocrinus, Uperocrinus pyriformis, Uperocrinus acuminatus, Eretmocrinus cloelia, Macrocrinus konincki, Dorycrinus quinquelobus, Aorocrinus nodulus, Agaricocrinus planoconvexus, Agaricocrinus inflatus, Dichocrinuspocillum Dichocrinus, Paradichocrinus liratus, Platycrinites glyptus, Platycrinites planus, Platycrinities spinifer, Cyathocrinites iowensis, Barycrinus spurious, Costalocrinus cornutus, Meniscocrinus, Pellecrinus obuncus, Atelestocrinus kentuckyensis, Holcocrinus spinobrachiatus, Blothrocrinus swallovi, Coeliocrinus subspinosus, Decadocrinus scalaris, Taxocrinus, Synbathocrinus dentatus, Halysiocrinus dactylus (from Nada Mbr.).Lee, K.G., W.I. Ausich, and T.W. Kammer. 2005. Crinoids from the Nada Member of the Borden Formation (Lower Mississippian) in eastern Kentucky. Journal of Paleontology, 79:337-355. Blastoids: Granatocrinus kentuckyensis (from New Providence Shale)

A rare soft-bodied fossil that was recovered from the Farmers Member of the Borden Formation in northeastern Kentucky was interpreted as a chondrophorine float (an internal anatomical feature).Ellis L. Yochelson and Charles E. Mason. 1986. A Chondrophorine Coelenterate from the Borden Formation (Lower Mississippian) of Kentucky, Journal of Paleontology, Vol. 60, No. 5 (September 1986), pp. 1025-1028

Trace fossils Zoophycos is present in the turbidites of the Farmers Member of the Borden Formation in Kentucky.

Stratigraphy There are three members of the Borden Group in Indiana.

Edwardsville Formation

The Edwardsville Formation is a geological structure in the Borden Group, of the Lower Mississippian sub system,Edwardsville Formation at the Indiana Geological Survey (Osagean, late Tournaisian). Crinoids fossils can be found in the formation.Crinoids from the Edwardsville Formation (Lower Mississippian) of Southern Indiana. William I. Ausich and N. Gary Lane, Journal of Paleontology, November 1982, Volume 56, Number 6, pages 1343-1361 (abstract)

New Providence Shale

The New Providence Shale is a geologic formation in Indiana. It is a basal clay-shale geologic formation in Indiana named by Charles Butts and William W. Borden in the 1874 after New Providence, Indiana (now Borden).

Spickert Knob Formation

The Spickert Knob Formation is a geologic formation in Indiana.

External links Upper Devonian—Lower Mississippian clastic rocks in northeastern Kentucky: Evidence for Acadian alpine glaciation and models for source-rock and reservoir-rock development in the eastern United States, Ettensohn, F.R., Lierman, R.T., and Mason, C.E., 2009, American Institute of Professional Geologists, Kentucky Section, Spring Field Trip, April 18, 2009 Matchen, D.L. and T.W. Kammer. 1994. Sequence stratigraphy of the Lower Mississippian Price and Borden Formations in southern West Virginia and eastern Kentucky. SOUTHEASTERN GEOLOGY, 34:25-41. PDF

References

Sources

Generalized Stratigraphic Column of Indiana Bedrock