Île Rouleau is an impact crater in Baie-James, Quebec, Canada,Earth Impact DB - Île Rouleau located on a small, uninhabited island in Lake Mistassini in the centre of the province.
The crater is in diameter and the age is estimated to be less than 300 million years (Permian 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
External links Aerial Exploration of the Ile Rouleau Structure