Saint Martin is an impact crater in Manitoba, Canada.
It is 40 km (25 mi) in diameter and its age is estimated at 220 ± 32 million years (Triassic). The crater is not exposed at the surface.
Hypothetical multiple impact event 
It has been suggested by Geophysicist David Rowley of the University of Chicago, working with John Spray of the University of New Brunswick and Simon Kelley of the Open University, that the Saint Martin crater may have been part of a hypothetical multiple impact event which also formed the Manicouagan crater in northern Quebec, Rochechouart crater in France, Obolon' crater in Ukraine, and Red Wing crater in North Dakota. All of the craters had previously been known and studied, but their paleoalignment had never before been demonstrated. Rowley has said that the chance that these craters could be aligned like this due to chance are nearly zero.
External links 
Coordinates: 51°47′N 98°32′W / 51.783°N 98.533°W