Charlevoix crater

The Charlevoix crater is a large eroded meteorite impact crater in the Charlevoix region of Quebec, Canada. Only part of the crater is exposed at the surface, the rest being covered by the Saint Lawrence River. The original crater is estimated to have been 54 kilometres (34 mi) in diameter and the age is estimated to be 342 ± 15 million years (Mississippian). The projectile was probably a stony asteroid, at least 2 kilometres (1.2 mi) in diameter, and weighing an estimated 15 billion tonnes (1.7×10¹⁰ short tons). The Mont des Éboulements, situated in the exact centre of the crater, is interpreted as the central uplift, a consequence of elastic rebound.^[2] The crater is classified as a multi-ringed basin with a central uplift.

• http://en.wikipedia.org/wiki/Charlevoix crater