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Impact Crater Diagram
Impact Crater Diagram (click to enlarge)

Impact Crater Diagram

Schematic cross sections of (a) a simple crater and (b) a complex crater showing idealized form, structure and distribution of impact units.

Simple crater forms are typical of structures with rim diameters of less than about 4 kilometers (on Earth); above this transition diameter, craters are characterized by complex morphologies exhibiting central uplifts, shallow floor depths, and slumped rims.

For complex craters with diameters of about 4 to 50 kilometers the central uplift occurs as a single peak. Larger impact structures can have complex, ring-shaped central uplifts.

Image Credit: NASA

Credit: Lunar and Planetary Institute

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Last Updated: 20 Jan 2011