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Indiana: Indiana Geological Survey Bulletin 43, p. 105-106. Gray, H. H., 1972, Geologic map of the 1° x 2° Louisville quadrangle, Indiana, showing bedrock and unconsolidated deposits: Indiana Geological Survey Regional Geologic Map No. 6, Part A [bedrock units]. Gray, H. H., 1972, Lithostratigraphy of the Maquoketa Group (Ordovician) in Indiana: Indiana Geological Survey Special Report 7, 31 p. Gray, H. H., and Shaver, R. H., 1986, Maquoketa Group, in Shaver, R. H., Ault, C. H., Burger, A. M., Carr, D. D., Droste, J. B., Eggert, D. L., Gray, H. H., Harper, Denver, Hasenmueller, N. R., Hasenmueller, W. A., Horowitz, A. S., Hutchison, H. C., Keith, B. D., Keller, S. J., Patton, J. B., Rexroad, C. B., and Wier, C. E., Compendium of Paleozoic rock-unit stratigraphy in Indiana–a revision: Indiana Geological Survey Bulletin 59, p. 88-89. Gray, H. H., Forsyth, J. L., Schneider, A. F., and Gooding, A.M., 1972, Geologic map of the 1° x 2° Cincinnati quadrangle, Indiana and Ohio, showing bedrock and unconsolidated deposits: Indiana Geological Survey Regional Geologic Map No. 7, Part A [bedrock units]. Gutstadt, A. M., 1958, Cambrian and Ordovician stratigraphy and oil and gas possibilities in Indiana: Indiana Geological Survey Bulletin 14, 103 p. Gutstadt, A. M., 1958, Upper Ordovician stratigraphy of the eastern interior region: American Association of Petroleum Geologists Bulletin, v. 42, p. 513-547. Hay, H. B., 1981, Lithofacies and formations of the Cincinnatian Series (Upper Ordovician), southeastern Indiana and southwestern Ohio: Oxford, Ohio, Miami University, Ph.D. thesis, 238 p. McEwan, E. D., 1920, A study of the brachiopod genus Platystrophia: U.S. National Museum Proceedings, v. 56, p. 383-448. Nickles, J. M., 1902, The geology of Cincinnati: Cincinnati Society of Natural History Journal, v. 20, no. 2, p. 49-100. Nicoll, R. S., and Rexroad, C. B., 1968, Stratigraphy and conodont paleontology of the Salamonie Dolomite and Lee Creek Member of the Brassfield Limestone (Silurian) in southeastern Indiana and adjacent Kentucky: Indiana Geological Survey Bulletin 40, 73 p. Rexroad, C. B., 1980, Stratigraphy and conodont paleontology of the Cataract Formation and the Salamonie Dolomite (Silurian) in northeastern Indiana: Indiana Geological Survey Bulletin 58, 83 p. Rooney, L. F., 1966, Evidence of unconformity at top of Trenton Limestone in Indiana and adjacent states: American Association of Petroleum Geologists Bulletin, v. 50, p. 533-546. Shaver, R. H., coordinator, 1984, Midwestern basin and arches region–correlation of stratigraphic units in North America (COSUNA): American Association of Petroleum Geologists Correlation Chart Series. Templeton, J. S., and Willman, H. B., 1963, Champlainian Series (Middle Ordovician) in Illinois: Illinois
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