impact crater
An impact crater is a depression (geology), depression in the surface of a solid astronomical body formed by the hypervelocity impact event, impact of a smaller object. In contrast to volcanic craters, which result from explosion or internal c ...
in
Baie-James
The Baie-James () was a List of former municipalities in Quebec, former municipality in northern Quebec, Canada, which existed from 1971 to 2012. Located to the east of James Bay, Baie-James covered of land, making it the largest incorporated ...
,
Quebec
Quebec is Canada's List of Canadian provinces and territories by area, largest province by area. Located in Central Canada, the province shares borders with the provinces of Ontario to the west, Newfoundland and Labrador to the northeast, ...
in the centre of the province.
The crater is in diameter and the age is estimated to be less than 300 million years (
Permian
The Permian ( ) is a geologic period and System (stratigraphy), stratigraphic system which spans 47 million years, from the end of the Carboniferous Period million years ago (Mya), to the beginning of the Triassic Period 251.902 Mya. It is the s ...
or younger). Part of the crater is exposed to the surface, but most of it is under the waters of the lake.
References
Further reading
* Caty, J. L., Chown, E.H. and Roy,D.W., A new astrobleme: Ile Rouleau structure, Lake Mistassini, Quebec. Canadian Journal of Earth Sciences, v. 13, pp. 824–831. 1976
* Evangelatos, J., Butler, K.E. and Spray, J.G., A marine magnetic study of a carbonate-hosted impact structure: Ile Rouleau, Canada. Geophysical Journal International, v. 179, pp. 171–181. 2009