Sääksjärvi
| Crater Name | Location | Latitude | Longitude | Diameter (km) | Age (Ma) | Exposed | Drilled | Target Rock** | Bolide Type*** |
|---|---|---|---|---|---|---|---|---|---|
| Saint Martin | Manitoba, Canada | N 51° 47' | W 98° 32' | 40 | 220 ± 32 | N | Y | M | - |
1 & 2. Map
References |
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Barry, G. S., Geology of the Gods Narrows Area. Province of Manitoba, Department of Mines and Natural Resources, v. Publication 60-1, pp. 1-34. 1961. |
Clark, J. F., Geomagnetic surveys at four Canadian craters. Canada Department of Energy, Mines and Resources, Earth Physics Branch, Geomagnetic Report, pp. 1-41. 1979. |
Clark, J. F., Magnetic survey data at meteoritic impact sites in North America. Geomagnetic Service of Canada, Earth Physics Branch Open File # 83-5, 30 p. 1983. |
Coles, R. L., Clark, J. F., Lake St. Martin impact structure, Manitoba, Canada: Magnetic anomalies and magnetizations. Journal of Geophysical Research, v. 87, pp. 7087-7095. 1982. |
Currie, K. L., Lake St. Martin structure, Manitoba (62 O) (abstract). Geological Survey of Canada, Department of Energy, Mines and Resources, Paper 70-1, Part A, p. 111. 1969. |
Currie, K. L., New Canadian cryptoexplosion crater at Lake St. Martin, Manitoba. Nature, v. 226, pp. 839-841. 1970. |
Davids, C., Gosnold, W. D., Gravity survey of the Lake Saint Martin impact structure, Southern Manitoba (abstract). GSA, Abstracts with Programs, pp. A-208. 1995. |
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Desbarats, A.J., On elevated fluoride and boron concentrations in groundwaters associated with the Lake Saint-Martin impact structure, Manitoba, Applied Geochemistry, v. 24, pp. 915-927, 2009 |
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McCabe, H. R., GS-18 stratigraphic core hole program. Report of field activities, 1977. Manitoba Department of Mines, Resources and Environment Management, Mineral Resources Division, pp. 93-96. 1977. |
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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) |