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Science. 2010 Aug 13;329(5993):804. doi: 10.1126/science.1190990. Epub 2010 Jul 22.

The Kamil Crater in Egypt.

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1
Museo Nazionale dell'Antartide Università di Siena, Via Laterina 8, 53100 Siena, Italy. folco@unisi.it

Abstract

We report on the detection in southern Egypt of an impact crater 45 meters in diameter with a pristine rayed structure. Such pristine structures are typically observed on atmosphereless rocky or icy planetary bodies in the solar system. This feature and the association with an iron meteorite impactor and shock metamorphism provides a unique picture of small-scale hypervelocity impacts on Earth's crust. Contrary to current geophysical models, ground data indicate that iron meteorites with masses of the order of tens of tons can penetrate the atmosphere without substantial fragmentation.

PMID:
20651117
DOI:
10.1126/science.1190990
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