The circular structure of Gweni-Fada, Ennedi: a new meteorite impact crater in northern Chad.

Details The circular structure of Gweni-Fada, Ennedi: a new meteorite impact crater in northern Chad. The circular structure of Gweni-Fada, Ennedi: a new meteorite impact crater in northern Chad.

Dec 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996crasb.323..987v&link_type=abstract

Comptes Rendus de l'Academie des Sciences, Sér. II, Fasc. a, Tome 323, No. 12, p. 987 - 997

Astronomy and Astrophysics

Astronomy

3

Meteorite Craters: Structure, Earth: Impact Craters

Scientific paper

The minimum diameter of Gweni-Fada astrobleme is 14 km. It lies entirely within Lower Palaeozoic sandstones. Its main characteristics are its asymmetry, and the size of the central uplift. The peripheral depression has a crescent form. The central zone forms a disrupted structural dome whose summit is higher than the ramparts and displaced toward the south. Several sets of characteristic planar deformation features are present in the quartz grains of the central zone. Gweni-Fada is the fourth largest impact crater in Africa.

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