An
impact crater is an approximately circular
depression in the surface of a
planet,
moon, or other solid body in the
Solar System or elsewhere, formed by the
hypervelocity impact of a smaller body with the surface. In contrast to
volcanic craters, which result from explosion or internal collapse, impact craters typically have raised rims and floors that are lower in elevation than the surrounding terrain. Impact craters range from small, simple, bowl-shaped depressions to large, complex, multi-ringed impact basins.
Meteor Crater is perhaps the best-known example of a small impact crater on Earth.