Crater Name  Location  Latitude  Longitude  Diameter (km)  Age (Ma)  Exposed  Drilled  Target Rock**  Bolide Type***
 Ouarkziz  Algeria  N 29° 0'  W 7° 33'  3.5  < 70  Y  N  S  -

1. Space Shuttle image STS41C-31-1032

2. Landsat Thematic Mapper - Detail

3. 3D Image (anaglyph)

4. DEM Image Provided by Dr. Carlos Roberto de Souza Filho

5 & 6. Image Provided by Dr. Carlos Roberto de Souza Filho


Denaeyer, M. -E., Gérards, J., A quelle cause attribuer les dépressions cratérifromes du Rwanda? (in French). Bulletin des Séances, v. 4, pp. 784-798. 1973.
Fabre, J., Kazi-Tani, N. and Megartsi,M., The "circle" of Ouarkziz (northwestern Sahara), an astrobleme? (in French). Comptes Rendus, Academie des Sciences, Paris, v. 270, serie D, pp. 1212-1215. 1970.
Fabre, J., Kazi-Tani, N., Megartsi., Ouarkziz, Global Impact Studies Project web page.
Grieve, R. A. F., The record of impact on Earth: Implications for a major Cretaceous/Tertiary impact event. Geological Society of America, Special Paper 190, pp. 25-37. 1982.
Gurov, E. P., Gurova, E. P., Impact structures on the Earth's surface (in Russian). Geologicheskii Zhurnal, v. 47, pp. 117-124. 1987.
Koeberl, C., African meteorite impact craters: Characteristics and geological importance. Journal of African Sciences, v. 18, pp. 263-295. 1994.
Lambert, P., McHone, J.F. Jr., Dietz, R.S., Briedj, M. and Djender,M., Impact and impact-like structures in Algeria. Part II, multi-ringed structures. Meteoritics, v. 16, pp. 203-227. 1981.
Masaitis, V. L., Danilin, A.N., Maschak, M.S., Raykhlin, A.I., Selivanovskaya, T.V. and Shadenkov,Ye.M., The Geology of Astroblemes (in Russian). Leningrad, Nedra, 231 p. 1980.
* pre-1977 K-Ar, Ar-Ar and Rb-Sr ages recalculated using the decay constants of Steiger and Jager (1977) Ages in millions of years (Ma) before present.

** Abbreviations: C - Crystalline Target; C-Ms - Metasedimentary Target; M - Mixed Target (i.e.sedimentary strata overlying crystalline basement); S - sedimentary target (i.e. no crystalline rocks affected by the impact event). From Osinski. G. R., Spray J. G., and Grieve R. A. F. 2007. Impact melting in sedimentary target rocks: A synthesis. In The Sedimentary Record of Meteorite Impacts, Geological Society of America Special Paper. Editors: Evans K. Horton W., King D., Morrow J., and Warme J. Geological Society of America: Boulder, in press.

***From Koeberl,C. Identification of meteoritic components in impactites. 1998, Koeberl, C. The Geochemistry and Cosmochemistry of Impacts. 2007 and PASSC Files. (IAB, IIIAB, IIIB, IIID - Iron Meteorite)