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Geochronological arguments for a close relationship between surficial formation profiles and environmental crisis (c. 3000-2000 BP) in Gabon (Central Africa).

Abstract : We present new 14C data on charcoal fragments recovered from the lower (coarse-grained Stone Line) and upper (fine-grained Cover Horizon) portions of surficial formation profiles in Gabon. These data and others compiled from the literature enable a reconstruction of the Upper Holocene geological regional history of Gabon. The connection between the geological events recorded in the surficial formations and the upper Holocene environmental crisis is discussed and a scenario connecting geological events with climatic and environmental changes is proposed. Such a scenario suggests that following the climatic crisis, the reconstitution of soils by aeolian sedimentation could have been an important factor of Bantu expansion.
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https://hal-brgm.archives-ouvertes.fr/hal-00904029
Contributeur : Denis Thiéblemont <>
Soumis le : mercredi 13 novembre 2013 - 15:41:08
Dernière modification le : vendredi 3 juillet 2020 - 09:33:52

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Denis Thiéblemont, Christine Fléhoc, Michel Ebang Obiang, Christophe Rigollet, Jean-Pierre Prian, et al.. Geochronological arguments for a close relationship between surficial formation profiles and environmental crisis (c. 3000-2000 BP) in Gabon (Central Africa).. Comptes Rendus Géoscience, Elsevier Masson, 2013, 345 (7-8), pp.272-285. ⟨10.1016/j.crte.2013.06.002⟩. ⟨hal-00904029⟩

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