Tectonic–karstic origin of the alleged “impact crater” of Lake Isli (Imilchil district, High Atlas, Morocco) - 18/06/14
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Abstract |
The scenic lakes Tislit and Isli of the Imilchil area in the central High Atlas of Morocco have been recently promoted to the rank of “dual impact crater” by a group of geoscientists. This was promptly denied by a group of meteorite specialists, but the first team reiterated their impact crater interpretation, now restricted to Lake Isli. This alleged 40-kyr-old impact crater would be associated with the Agoudal meteorite recognized further in the southeast. Here, we show that the lake formed during the Lower–Middle Pleistocene in a small Pliocene (?) pull-apart basin through additional collapsing due to karst phenomena in the underlying limestones. This compares with the formation of a number of lakes of the Atlas Mountains. None of the “proofs” produced in support of a meteoritic origin of Lake Isli coincides with the geology of the area.
Le texte complet de cet article est disponible en PDF.Keywords : Tectonic, Karst, High Atlas, Lake Isli, Morocco
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Vol 346 - N° 3-4
P. 82-89 - mars 2014 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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