PAILLOU, Philippe

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PAILLOU, Philippe
Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
Observatoire aquitain des sciences de l'univers [OASU]
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]

Langue

Communication dans un congrès

Ce document a été publié dans

Lunar and Planetary Institute Seminar Series 2005, Lunar and Planetary Institute Seminar Series 2005, 2005, Houston. 2005p. -

Résumé en anglais

Using orbital imaging radar, we have detected a large number of circular structures in the southwestern Egyptian desert, covering more than 4500 km2 close to the Gilf Kebir plateau in sandstones of Upper Cretaceous. Fieldwork confirmed that it is a new impact crater field: 13 craters from 20 m to 1 km in diameter were studied. The impact origin is confirmed by the observation of shock-related structures, such as shatter cones and planar fractures in quartz grains of breccia. Considering the extension of the crater field, it was possibly created by several meteorites that broke up when entering the atmosphere.< Réduire

Mots clés en anglais

impact

crater field

Egypt

radar

Gilf Kebir

Origine

Importé de hal

Unités de recherche

Laboratoire d'Astrophysique de Bordeaux (LAB) - UMR 5804