Mistastin crater

Mistastin crater is a meteorite crater in Labrador, Canada which contains the roughly circular Mistastin Lake.

The lake's arcuate central island is interpreted to be the central uplift of the complex crater structure. The target rocks were part of a batholith composed of adamellite, mangerite and lenses of anorthosite. There are abundant shock metamorphic features exhibited in the rocks of the island. Planar deformation features, diaplectic glass, melt rocks, and shatter cones have been identified.

The lake is approximately 16 km (9.9 mi) in diameter, while the estimated diameter of the original crater is 28 km (17 mi). The age of the crater is calculated to be 36.4 ± 4 million years (Eocene).