Gweni-Fada crater

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Landsat image of the Gweni-Fada crater; screen capture from NASA World Wind

Oblique Landsat image of Gweni-Fada crater draped over digital elevation model (x2 vertical exaggeration); screen capture from NASA World Wind

Gweni-Fada is a meteorite crater in Chad, Africa.^[1]

It is 14 km in diameter and the age is estimated to be less than 345 million years (Carboniferous). The crater is exposed at the surface.

[edit] References

Geology

Lists	Worldwide Africa Antarctica Asia Australia Europe North America South America by country

Confirmed ≥20 km diameter	Acraman Amelia Creek Araguainha Beaverhead Boltysh Carswell Charlevoix Chesapeake Bay Chicxulub Clearwater East & West Gosses Bluff Haughton Kamensk Kara Karakul Keurusselkä Lappajärvi Logancha Manicouagan Manson Mistastin Mjølnir Montagnais Morokweng Nördlinger Ries Obolon' Popigai Presqu'île Puchezh-Katunki Rochechouart Saint Martin Shoemaker Siljan Slate Islands Steen River Strangways Sudbury Tookoonooka Vredefort Woodleigh Yarrabubba

Topics	Alvarez hypothesis breccia coesite complex crater cryptoexplosion ejecta blanket impact crater impact structure impactite K–T boundary Late Heavy Bombardment lechatelierite meteorite moldavite planar deformation features shatter cone shock metamorphism shocked quartz stishovite suevite tektite

Research	Baldwin, Ralph Belknap Barringer, Daniel Barringer Medal Chao, Edward C T Dietz, Robert S Earth Impact Database Hartmann, William K Impact Field Studies Group Lunar and Planetary Institute Melosh, H Jay Ryder, Graham Schultz, Peter H Shoemaker, Eugene Traces of Catastrophe book

Astronomy

Observation	Catalina Sky Survey Earth-crosser asteroid impact event LINEAR LONEOS meteoroid Meteoritical Society NASA NEAT Near-Earth Object (NEO) NEOSSat Orbit@home Palermo Scale Pan-STARRS planetary science potentially hazardous object Sentry Spacewatch Torino Scale WISE

Defense	Asteroid-impact avoidance B612 Foundation Gravity tractor Ion Beam Shepherd NEOShield Spaceguard

Potential threats	99942 Apophis 1950 DA 1999 RQ36 2004 VD17 2007 VK184 2011 AG5