Large Meteorite Impacts and Planetary Evolution IV
Polygonal impact craters in the solar system: Observations and implications
Published:September 01, 2010
T. Öhman, M. Aittola, J. Korteniemi, V.-P. Kostama, J. Raitala, 2010. "Polygonal impact craters in the solar system: Observations and implications", Large Meteorite Impacts and Planetary Evolution IV, Roger L. Gibson, Wolf Uwe Reimold
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Impact crater formation is sometimes affected by preexisting target inhomogeneities like faults or joint sets in ways that cause the plan view of the crater to deviate from the idealized circular shape. The resulting polygonal impact craters have been known to exist on the Moon for over a century, and they have been subsequently identified on all types of solid surface bodies in the solar system, including all the terrestrial planets. Newly identified polygonal impact craters in the central southern near-side highlands of the Moon display a size distribution clearly different from the nonpolygonal craters, confirming earlier results: lunar polygonal...