Meteoritic impact origin of the annular depression of Aorounga, Chad (Africa).

Details Meteoritic impact origin of the annular depression of Aorounga, Chad (Africa). Meteoritic impact origin of the annular depression of Aorounga, Chad (Africa).

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992crasb.315...83b&link_type=abstract

Comptes Rendus de l'Academie des Sciences, Sér. II, Tome 315, No. 1, p. 83 - 88

Computer Science

6

Scientific paper

The complex annular topography, the presence of shatter cones and breccias with quartz showing multiple sets of planar structures, indicative of shock metamorphism, indicate a meteoritic impact origin for the circular depression of Aorounga (Chad, Africa). The age of the impact, based on the good conservation of the crater and the presence of a poorly developed hydrographic network, may be about -12,000 to -3,500 B.P.

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