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

 

Clearwater East

Crater Name
Location
Latitude
Longitude
Diameter (km)
Age (Ma)*
Exposed
Drilled
Target Rock**
Bolide Type***
Clearwater East
Quebec, Canada
N 56° 5'
W 74° 7'
26
460-470
Y
Y
M
Chondrite

 

North is to the right

Landsat Image

DEM

References
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Beals, C. S., Ferguson, G.M. and Landau,A., A search for analogies between lunar and terrestrial topography and photographs of the Canadian shield. Journal of the Royal Astronomical Society of Canada, v. 50, pp. 203-222, 304-333, 350-361. 1956.
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Dabizha, A. I., Ivanov, B. A., A geophysical model of the structure of meteorite craters and some problems of the mechanics of crater formation (in Russian). Meteoritika, v. 37, pp. 160-167. 1978.
Dabizha, A. I., Krass, M. S., The evolution of explosive meteorite craters on Earth (in Russian). "Zemlya i Vselennaya", v. 5, pp. 80-88. 1975.
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Dence, M. R., A comparative structural and petrographic study of probable Canadian meteorite craters. Meteoritics, v. 2, pp. 249-270. 1964.
Dence, M. R., Engelhardt, W.v., Plant, A.G. and Walter,L., Indications of fluid immiscibility in glass from West Clearwater Lake impact structure, Quebec, Canada. Contributions to Minerology and Petrology, v. 46, pp. 81-97. 1974.
Dence, M. R., Innes, M.J.S. and Beals,C.S., New meteor crater. Space Science, v. 13, p. 8. 1963.
Dence, M. R., Innes, M.J.S. and Beals,C.S., On the probable meteorite origin of the Clearwater Lakes, Quebec. Journal of the Royal Astronomical Society of Canada, v. 59, pp. 13-22. 1965.
Dence, M. R., Meteorite breakup. Nature, v. 289, pp. 346. 1981.
Dence, M. R., Shock zoning at Canadian craters: Petrography and structural implications. French, B.M. and Short, N.M., eds., Shock Metamorphism of Natural Materials, Mono Book Corporation, Baltimore, MD, pp. 169-184. 1968.
Dence, M. R., The extraterrestrial origin of Canadian craters. New York Academy of Sciences, Annals, v. 123, pp. 941-969. 1965.
Dence, M. R., The nature and significance of terrestrial impact structures. International Geological Congress, 24th, Montreal, Canada, pp. 77-89. 1972.
Engelhardt, W. v., Horz, F., Stoffler, D. and Bertsch,W., Observations on quartz deformation in breccias of West Clearwater Lake, Canada, and the Ries Basin, Germany. French, B.M. and Short, N.M., eds., Shock Metamorphism of Natural Materials, Mono Book Corp., Baltimore, MD, pp. 475-482. 1968.
Evans, N. J., Gregoire, D.C., Grieve, R.A.F., Goodfellow, W.D. and Veizer,J., Use of platinum-group elements for impactor identification: Terrestrial impact craters and Cretaceous-Tertiary boundary. Geochemica et Cosmochimica Acta, v. 57, pp. 3737-3748. 1993.
Fehn, U., Teng, R., Elmore, D. and Kubik,P.W., Isotopic composition of osmium in terrestrial samples determined by accelerator mass spectrometry. Nature, v. 323, pp. 707-710. 1986.
Fel'dman, V. I., Rare-Earth elements in astrobleme impactites. Geochemistry International, v. 32, pp. 24-48. 1995.
Fleischer, R. L., Viertl, J.R.M. and Price,P.B., Age of the Manicouagan and Clearwater Lake craters. Geochimica et Cosmochimica Acta, v. 33, pp. 523-527. 1969.
Goltrant, O., Cordier, P and Doukhan, J - C., Planar deformation features in shocked quartz; a transmission electron microscopy investigation. Earth and Planetary Science Letters, v. 106, pp. 103-115. 1991.
Grahn, Y., Chitinozoan Biostratigraphy of the Early Caradocian Lockne Impact Structure, Jamtland, Sweden, Meteoritics; vol. 32, p. 745-51. 1997.
Grieve, R. A. F., Meteoritic component and impact melt composition at the Lac a L'Eau Claire (Clearwater) impact structures, Quebec. Geochimica et Cosmochimica Acta, v. 42, pp. 429-431. 1978.
Grieve, R. A. F., Palme, H. and Plant,A.G., Siderophile-rich particles in the melt rocks of the E. Clearwater impact structure, Quebec: Their characteristics and relationship to the impacting body. Contributions to Mineralogy and Petrology, v. 75, pp. 187-198. 1980.
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.
Halliday, I., Theories of the origin of Hudson Bay. Part II: Supporting astronomical evidence from three members of the solar system. Ottawa Dominion Observatory Contribution, v. 4, no. 29. 1968.
Hische, R., Clearwater Impact Structure, Quebec, Canada, I: A 3-dimensional model (abstract). European Science Foundation, Second International Workshop, Impact Cratering and Evolution of Planet Earth. The Identification and Characterization of Impacts, Lockne, Sweden. 1994.
Hische, R., Clearwater impact structure, Quebec, Canada: Distribution of planar deformation features in quartz, exemplified by drill hole 363 (abstract). European Science Foundation, Third International Workshop. Shock Wave Behaviour of Solids in Nature and Experiments, Limoges, France. 1994.
Hische, R., Clearwater impact structure, Quebec, Canada: Modeling of the impact conditions (abstract). Meteoritics, v. 29, pp. 473-474. 1994.
Hische, R., Deutsch, A. and Ivanov,B.A., On the origin of the Clearwater Lakes impact structures (Canada): Twins or not? (abstract). IV International Conference on Advanced Material, Symposium 19, Cancún, Mexico. 1995.
Innes, M. J. S., Dence, M.R. and Robertson,P.B., Recent geological and geophysical studies of Canadian craters. French, B.M. and Short, N.M., eds., Shock Metamorphism of Natural Materials, Mono Book Corp., Baltimore, MD, pp. 339-362. 1968.
Koeberl, C., Chromium isotopic studies of terrestrial impact craters: Identification of meteoritic components at Bosumtwi, Clearwater East, Lappajarvi, and Rochechouart, Earth and Planetary Science Letters, 256, P. 534 - 546. 2007.
Kranck, S. H., Sinclair, G. W., Clearwater Lake, New Quebec. Geological Survey of Canada, Bulletin 100, 25 pp. 1963.
Lozej, G. P., Dence, M.R. and Beales,F.W., Crateri meteoritici terrestri: revisione e discussione con esempi di crateri dello scudo Canadese. Geologia Tecnica, v. 5, pp. 157-181. 1971.
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.
McDonald, I., Clearwater East impact structure: A re-interpretation of the projectile type using new platinum-group element data from meteorites, Meteorite & Planetary Science 37, 459-464 (2002). 2002.
McHone J F., Dietz, R. S., Earth's multiple impact craters and astroblemes (abstract). Lunar and Planetary Science, v. XXIII, pp. 887-888. 1992.
McIntyre, D. B., Impact metamorphism at Clearwater Lake, Quebec (abstract). Journal of Geophysical Research, v. 67, pp. 1647. 1962.
McIntyre, D. B., Impact metamorphism at Clearwater Lake, Quebec. French, B.M. and Short, N.M., eds., Shock Metamorphism of Natural Materials, Mono Book Corp., Baltimore, MD, pp. 363-366. 1968.
Ogilvie, B. Y., Robertson, B. and Grieve,R.A.F., Meteorite impact features in Canada: An inventory and an evaluation. Unpublished Report, 180 p. 1984.
Palme, H., Goebel, E and Grieve,R.A.F., The distribution of volatile and siderophile elements in the impact melt of East Clearwater (Quebec). Proceedings Lunar and Planetary Science Conference 10th, v. 3, pp. 2465-2492. 1979.
Palme, H., Grieve, R. A. F., The chemical composition of the impact melt at the Clearwater East impact structure, Quebec, Canada (abstract). Meteoritics, v. 13, pp. 595-596. 1978.
Palme, H., Grieve, R.A.F. and Wolf,R., Identification of the projectile at Brent crater, and further considerations of projectile types at terrestrial craters. Geochimica et Cosmochimica Acta, v. 45, pp. 2417-2424. 1981.
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Parfenova O V., Yakovlev, O. I., Some peculiarities of selective evaporation in target rocks after meteoritic impact. Impact and Explosion Cratering, D. J. Roddy, R. O. Pepin and R. B. Merrill, Pergamon Press, New York, pp. 843-859. 1977.
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Phinney, W. C., Simonds, C.H., Cochran, A. and McGee,P.E., West Clearwater, Quebec impact structure, Part II: Petrology. Proceedings Lunar and Planetary Science Conference 9th, v. 2, pp. 2659-2693. 1978.
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Schmieder, M., Schwarz, W. H., Trieloff, M., Tohver, E., Buchner, E., Hopp, J., and Osinski, G. R. 2014. New 40Ar/39Ar dating of the Clearwater Lake impact structures (Québec, Canada) – Not the binary asteroid impact it seems? Geochimica et Cosmochimica Acta, (0), -. doi:http://dx.doi.org/10.1016/j.gca.2014.09.037
Schmieder, M., Schwarz, W. H., Trieloff, M., Tohver, E., Buchner, E., Hopp, J., and Osinski, G. R. 2014. New 40Ar/39Ar dating of the Clearwater Lake impact structures (Québec, Canada) – Not the binary asteroid impact it seems? Geochimica et Cosmochimica Acta (in press). doi:http://dx.doi.org/10.1016/j.gca.2014.09.037
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* 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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