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Country Canada
CoordinatesLat. N 5147' Long.W 9832'
Diameter km 40.0
Age Ma or date 227.8 0.9
Synonyms Lake St. Martin
Remarks A well known impact structure mostly covered by water and sediments.

A 40Ar/39Ar age is from Schmieder et.al. 2014c. Earlier Rb/Sr age of 219.50 32.0 Ma was from Reimold et.al. 1990 (recalculated in Nebel et.al. 2011).
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CoM 1985 Graham, Bevan and Hutchison, ''Catalogue of Meteorites'', 4th Edition, (1985).
Currie 1970a Currie K.L., Nature, vol.226, p.839 (1970)
Currie 1970b Currie K.L., Geol. Surv. Canada, Paper 70-1, Part A, p.111 (1970)
Hodge 1994 Hodge, Paul W., ''Meteorite craters and impact structures of the Earth'', book, 122 pp, Cambridge University Press (1994)
Nebel et.al. 2011 Nebel O., Scherer E.E. and Mezger K., Evaluation of the 87Rb decay constant by age comparison against the U-Pb system. Earth Planet. Sci. Lett. 301, 1-8 (2011)
Reimond et.al. 1990 Reimold W.U., Barr J.M., Grieve R.A.F. and Durrheim R.J., Geochemistry of the melt and country rocks of the Lake St. Martin impact strcuture, Manitoba, Canada. Geochim. Cosmochim. Acta 54, 2093-2111 (1990)
Robertson 1975 Robertson P.B. and Grieve R.A.F., Journ. Roy. Astron. Soc. Canada, vol.69 (1975)
Schmieder et.al. 2014c Schmieder M., Jourdan F., Tohver E. and Cloutis E.A., 40Ar/39Ar age of the Lake Saint Martin impact structure (Canada) - Unchaining the Late Traissic terrestrial impact craters. Earth and Planetary Science Letters 406, 37-48 (2014)
Simonds 1977 Simonds C.H., Phinney W.C. and Warner J.L., "Effect of Water on Cratering: A Review of Craters and Impactities on the Earth, Moon and Mars", LSC VIII abstracts p.874-876 (1977)
Use of any material without permission is forbidden. Jarmo Moilanen - 2009-2014
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