IJAA  Vol.3 No.2 A , June 2013
Isli and Tislit: The First Dual Impact Crater Discovered in Morocco
Abstract: Isli and Tislit, the Moroccan “Romeo and Juliette” according to a popular legend gave their name to a twin lakes in Imilchil. There we show evidences that these two lakes are impact craters. The proof as follow: 1) the fragments of iron meteorites found on both sides of Isli and Tislit lakes belong to the same parent meteorite and siderite type; 2) the sedimentary formations which are almost tabular in the area of the lakes become tilted with a centripetal sloping all around and towards Isli lake; 3) the circular shape of the Tislit lake is similar to that of the Isli lake; 4) the impact breccias found on the south of the Isli lake contain shocked quartz crystals; 5) the radial fractures of high pressure affect some sedimentary beds. All these observations give evidence of the presence of an impact crater due to the fall of meteorites.
Cite this paper: A. Ibhi, H. Nachit, E. Abia, A. Touchnt and C. Vaccaro, "Isli and Tislit: The First Dual Impact Crater Discovered in Morocco," International Journal of Astronomy and Astrophysics, Vol. 3 No. 2, 2013, pp. 1-4. doi: 10.4236/ijaa.2013.32A001.

[1]   J. Spray, “Earth Impact Database,” 2011.

[2]   J. N. Salomon and T. Auly, “Impactors and Astroblems: Attempt of Classification and Geographical Approach,” Géomorphologie, No. 1, 2010, pp. 3-20.

[3]   P. Brown, R. E. Spalding, D. O. ReVelle, E. Tagliaferri and S. P. Worden, “The Flux of Small Near-Earth Objects Colliding with the Earth,” Nature, Vol. 420, No. 6913, 2002, pp. 294-296. doi:10.1038/nature01238

[4]   P. A. Bland and N. A. Artemieva, “The Rate of Small Impacts on Earth,” Meteoritics & Planetary Science, Vol. 41, No. 4, 2006, pp. 607-631. doi:10.1111/j.1945-5100.2006.tb00485.x

[5]   R. A. F. Grieve, “The Terrestrial Cratering Record,” In: B. Peucker-Ehrenbrink and B. Schmitz, Ed., Accretion of Extraterrestrial Matter Throughout Earth’s History, SpringerVerlag, New York, 2001, pp. 379-402.

[6]   A. Fadile, “Geological Map of Morocco, Imilchil,” Notes et Mémoires du Service Geologique Maroc, Vol. 397, 2003, scale 1:100 000, sheet 1.

[7]   H. Ibouh, “Du Rift Avorté au Bassin sur Décrochement, Controles Tectonique et Sédimentaire Pendant le Jurassique (Haut Atlas Central, Maroc),” Ph.D. Thesis, Cadi Ayyad University, Morocco, 2004.

[8]   A. Weisrock and M. Fontugne, “Morphogenèse Eolienne Littorale au Pléistocene Supérieur et à l’Holocène Dans l’Oulja Atlantique Marocaine,” Quaternaire, Vol. 3, No. 3-4,1991, pp. 164-175. doi:10.3406/quate.1991.1965

[9]   E. Zeroual, “Enregistrements Climatiques Dans les Sédiments de lac Isli (Haut Atlas, Maroc),” Ph.D. Thesis, Cadi Ayyad University, Morocco, 1995.

[10]   D. Stoeffler and F. Langenhorst, “Shock Metamorphism of Quartz in Nature and Experiment: I. Basic Observations and Theory,” Meteoritics & Planetary Science, Vol. 29, No. 2, 1994, pp. 155-181. doi:10.1111/j.1945-5100.1994.tb00670.x

[11]   R. A. F. Grieve, F. Langenhorst and D. Stoffler, “Shock Metamorphism of Quartz in Nature and Experiment,” Meteoritics & Planetary Science, Vol. 31, No. 1, 1996, pp. 6-35. doi:10.1111/j.1945-5100.1996.tb02049.x

[12]   A. Sagy, Z. Reches and J. Fineberg, “Dynamic Fracture by Large Extraterrestrial Impacts as the Origin of Shatter Cones,” Nature, Vol. 418, No. 6895, 2002, pp. 310-313. doi:10.1038/nature00903

[13]   J. F. Moyen, “La Structure d’Impact de Vredefort,” In: M. J. Van Kranendonk, R. H. Smithies and V. Bennett, Ed., Earth’s Oldest Rocks, Elsevier, 2007, pp. 669-698. 1107614/La_structure_ dimpact_de_Vredefort

[14]   M. R. Dence, “Meteorite Breakup,” Nature, Vol. 289, No 198, pp. 346-351.

[15]   B. M. French and C. Koeberl, “The Convincing Identification of Terrestrial Meteorite Impact Structures: What Works, What Doesn’t, and Why,” Earth-Science Reviews, Vol. 98, 2010, pp. 123-170. doi:10.1016/j.earscirev.2009.10.009