Crommelin is an impact crater in the Oxia Palus quadrangle of Mars, located at 5.1°N latitude and 10.2°W longitude.

Primitive organisms may have developed in such lakes; hence, some craters may be prime targets for the search for evidence of life on the Red Planet.

[10] The density of impact craters is used to determine the surface ages of Mars and other solar system bodies.

Water from the melting ice dissolves minerals and then deposits them in cracks or faults that were produced with the impact.

This process, called hydrothermal alteration, is a major way in which ore deposits are produced.