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Earth Impact Database Sorted by : | Name | Diameter | Age |



Crater Name
Diameter (km)
Age (Ma)*
Target Rock**
Bolide Type***
Indiana, U.S.A.
N 40° 45'
W 87° 24'
< 97



Bell, M. S., Sharpton, V. L., High-pressure shock effects in silica in St. Peter sandstone from the Kentland impact structure, Indiana, USA (abstract). Meteoritics & Planetary Science, v. 31, p. A13. 1996.
Bjornerud, M. G., Superimposed Deformation in Seconds: Breccias from the Impact Structure at Kentland, Indiana (USA), Tectonophysics v. 290 pp. 259-269. 1998.
Boyer, R. E., The geology of the structural anomaly near Kentland, Indiana. Master's Thesis, Indiana University, Bloomington, 54 p. 1953.
Brusnahan, H., Weber, J., Reynolds, R., Shock-metamorphic effects in lattice structure of sphalerite (ZnS) from impact breccia in the Kentland Crater, Indiana. Michigan Academic, vol. 384, pp.58. 2008.
Bucher, W. H., Cryptovolcanic structures in the United States (with discussion). International Geologic Congress, 16th, Report, v. 2, pp. 1055-1084. 1936.
Cockell, C. S., Lee, P., The Biology of Impact Craters - a review. Biol. Rev., 77, P. 279 - 310. 2002.
Cohen, A. J., Bunch, T.E. and Reid,A.M., Coesite discoveries establish cryptovolcanics as fossil meteorite craters. Science, v. 134, pp. 1624-1625. 1961.
Collins, H., Brown, L. A., Fracture analysis of the Kentland, Indiana, disturbance. Jackson, M.T., ed., Proceedings of the Indiana Acadamy of Science, v. 83, p.243. 1974.
Dabizha, A. I., Fedynsky, V. V., The Earth's "star wounds" and their diagnosis by geophysical methods (in Russian). "Zemlya i Vselennaya", v. 3, pp. 56-64. 1975.
Dietz, R. S., Meteorite impact suggested by the orientation of shattercones at the Kentland, Indiana, disturbance. Science, v. 105, pp. 42-43. 1947.
Grieve, R. A. F., The record of impact on Earth: Implications for a major Cretaceous/Tertiary impact event. Geological Society of America, Special Paper 190, pp. 25-37. 1982.
Gurov, E. P., Gurova, E. P., Impact structures on the Earth's surface (in Russian). Geologicheskii Zhurnal, v. 47, pp. 117-124. 1987.
Gutschick, R. C., Geology of the Kentland dome structurally complex anomaly, northwestern Indiana (Field Trip 5). Field trip in Midwestern Geology, Annual Meeting, Geological Society of America, Indianapolis, v. 1, pp. 105-138. 1983.
Gutschick, R. C., Geology of the Kentland impact structural anomaly, northwestern Indiana. Shaver, R.H. and Sunderman, J.A., eds., Field Guide for the National Association of Geology Teachers, East-central Section, 20 p. 1971.
Gutschick, R. C., Geology of the Kentland impact structural anomaly. Meteoritical Society, 35th Annual Meeting, Guidebook for Field Trip. 1972.
Gutschick, R. C., Geology of the Kentland structural anomaly, northwestern Indiana -- update. Purdue University, Department of Geosciences, and Geological Society of America,North-central Section, Guidebook 4, 38 p. 1982.
Gutschick, R. C., Geology of the Kentland structural anomaly, northwestern Indiana. Geological Society of America, Annual Meeting, North-central Section, Guidebook, pp. 59. 1976.
Gutschick, R. C., The Kentland structural anomaly, Indiana. Geology from Chicago to Cincinnati, Geological Society of America Guidebook for Field Trips, v. 2, pp. 12-17. 1961.
Gutschick, R. C., The stratigraphy and structure of the Kentland impact anomaly, Indiana (abstract). The Geological Society of America, v. 2, pp. 564-565. 1970.
Henderson, T., Milam, K.A., XRD analyses of Silurian carbonates from the central peak of the Kentland impact structure, Newton County, Indiana, USA (abstract). Geological Society of America, vol. 46, pp.760. 2014.
Henderson, T., Milam, K.A., XRD analyses of Silurian dolostones from the the central uplift of the Kentland impact structure, Newton County, Indiana, USA (abstract). 46th Lunar and Planetary Science Conference, abstract no. 2989. 2015. 
Huss, Q. S., Shocked Quartz of the St. Peter Sandstone from the Kentland Structural Anomaly, Indiana, USA, GSA Abstracts with Programs, NCS Abstr. 7476. 1996.
Jackson, M., Van der Voo, R., A paleomagnetic estimate of the age and thermal history of the Kentland, Indiana cryptoexplosion structure. Journal of Geology, v. 94, pp. 713-723. 1986.
Koeberl, C., Sharpton, V. L., Geochemical study of rocks from the Kentland, Indiana, impact structure: Progress report (abstract). Meteoritics, v. 28, pp. 382. 1993.
Laney, R. T., A structural and petrographic study of the Kentland, Indiana impact site. Master's Thesis, University of Kansas. 1978.
Laney, R. T., Van Schmus, W. R., A structural study of the Kentland, Indiana impact site. Proceedings Lunar and Planetary Science Conference 9th, pp. 2609-2632. 1978.
Laney, R. T., Van Schmus, W. R., The Kentland impact site: A structural study of a partially dissected central uplift (abstract). EOS, v. 59, pp. 223. 1978.
Masaitis, V. L., Danilin, A.N., Maschak, M.S., Raykhlin, A.I., Selivanovskaya, T.V. and Shadenkov,Ye.M., The Geology of Astroblemes (in Russian). Leningrad, Nedra, 231 p. 1980.
Shrock, R. R., Malott, C. A., The Kentland area of disturbed Ordovician rocks in northwestern Indiana. Journal of Geology, v. 41, pp. 337-370. 1933.
Shrock, R. R., Stratigraphy and structure of the area of disturbed Ordovician rocks near Kentland, Indiana. American Midland Naturalist, v. 18, pp. 471-531. 1937.
Tudor, D. S., A geophysical study of the Kentland disturbed area. Ph.D. Thesis, Indiana University, Bloomington, 111 p. 1971.
Tudor, D. S., Mead, J and Rudman,A.J., A geophysical study of the Kentland disturbed area (abstract). Geological Society of America, v. 4, p. 353. 1972.
Votaw, R. B., Middle Ordovician conodonts from the Kentland structure, Indiana (abstract). Geological Society of America, v. 12, p. 259. 1980.
Weber, J., Impact geology; central uplift, Kentland impact structure, Newton County Stone (Kentland) Quarry, Indiana, USA. GSA Field guide, 31, 1-7. 2013. 
Zotkin, I. T., "Moon" craters on the Earth (in Russian). Priroda, v. 9, pp. 95-105. 1969.


* pre-1977 K-Ar, Ar-Ar and Rb-Sr ages recalculated using the decay constants of Steiger and Jager (1977) Ages in millions of years (Ma) before present.

** Abbreviations: C - Crystalline Target; C-Ms - Metasedimentary Target; M - Mixed Target (i.e.sedimentary strata overlying crystalline basement); S - sedimentary target (i.e. no crystalline rocks affected by the impact event). From Osinski. G. R., Spray J. G., and Grieve R. A. F. 2007. Impact melting in sedimentary target rocks: A synthesis. In The Sedimentary Record of Meteorite Impacts, Geological Society of America Special Paper. Editors: Evans K. Horton W., King D., Morrow J., and Warme J. Geological Society of America: Boulder, in press.

From Koeberl,C. Identification of meteoritic components in impactites. 1998, Koeberl, C. The Geochemistry and Cosmochemistry of Impacts. 2007 and PASSC Files. (IAB, IIIAB, IIIB, IIID - Iron Meteorite)



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