The development of central peaks in lunar craters

Details The development of central peaks in lunar craters The development of central peaks in lunar craters

Dec 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981m%26p....25..465b&link_type=abstract

Moon and the Planets, vol. 25, Dec. 1981, p. 465-476.

Physics

2

Hypervelocity Impact, Lunar Craters, Meteorite Craters, Peaks (Landforms), Shock Wave Propagation, Shock Fronts, Statistical Analysis, Supersonic Speed, Wave Reflection

Scientific paper

A correlation is established between the height of lunar crater central peaks and the vertical depth below the original position of impact at which the shock wave front and the reflected rarefaction wave front from the back surface of the meteorite intersect. The method used involved consideration of observed lunar central peak heights and equations describing the supersonic impact of a solid projectile on a solid target over a possible impact velocity range of 9-20 km/sec, yielding close agreement for 77% of catalogued class 1 lunar central peak craters. It is proposed that the intersection of the two wave fronts locally inhibits the ejection of uplifted material during the latter stages of the excavation phase, leading to the formation of a centrally placed region of uplifted material within the newly formed crater.

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