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L'évolution morpho-climatique plio-quaternaire de la basse vallée de l'Omo (Ethiopie)

Abstract : During the Pliocene, which was relatively wet, ends the elaboration of pediments on which plio-villafranchian formations settle when the climate becomes more and more dry. During the Middle and Upper Pleistocene, a relief of cuestas and faults escarpements develops from a lacustral abrasion surface cutting off the hard faulted plio-villafranchian formations. During the Upper Pleistocene-Holocene, after the deposit of the Kibish formation and of its lateral equivalents and after the formation of the Nakwas (Kuraz Range), the Omo river cuts its valley in spite of the nakurian transgression.
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https://hal-amu.archives-ouvertes.fr/hal-01542503
Contributor : Jean-Louis Ballais <>
Submitted on : Monday, June 19, 2017 - 5:51:28 PM
Last modification on : Thursday, May 14, 2020 - 6:40:07 PM
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  • HAL Id : hal-01542503, version 1

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Jean-Louis Ballais. L'évolution morpho-climatique plio-quaternaire de la basse vallée de l'Omo (Ethiopie). Bulletin de la Société Géologique de France, Société géologique de France, 1979, (7) (t. XXI, n° 3), p. 259-263. ⟨hal-01542503⟩

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