Planetary science: Meteor Crater formed by low-velocity impact

Details Planetary science: Meteor Crater formed by low-velocity impact Planetary science: Meteor Crater formed by low-velocity impact

Mar 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005natur.434..157m&link_type=abstract

Nature, Volume 434, Issue 7030, pp. 157 (2005).

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Scientific paper

Meteor Crater in Arizona was the first terrestrial structure to be widely recognized as a meteorite impact scar and has probably been more intensively studied than any other impact crater on Earth. We have discovered something surprising about its mode of formation - namely that the surface-impact velocity of the iron meteorite that created Meteor Crater was only about 12 km s-1. This is close to the 9.4 km s-1 minimum originally proposed but far short of the 15-20 km s-1 that has been widely assumed - a realization that clears up a long-standing puzzle about why the crater does not contain large volumes of rock melted by the impact.

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