Contribution à l'approche morpho-stratigraphique du Pléistocène supérieur du Nord de la France : colmatage d'un vallon sec de la Gohelle (Avion, Pas-de-Calais)

Abstract : Two cross-sections through a small dry valley of the Gohelle (chalky country between Artois and lowlands of Northern France) show the preservation in places of a soils complex from the Eemian up to the Weichselian Middle Pleniglacial, upon an interfluve or the upper part of the slope. A reworking of the soils complex shows a subsequent strong slope erosion. In a same way, a coarse fluvial formation (chalk gravels) shows an active phase of the valleys network, probably at the transition between Middle and Upper Pleniglacial. The upper pleniglacial loess is settled over more 7 meters on the leeward slope and filled up a palaeovalley (clearly lower than the current talweg), overlying the previous stratigraphic units. Before the deep test pits campaign, the slight dissymmetrical transverse profile didn't allow assuming the great aeolian deposits extent.
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Laurent Deschodt. Contribution à l'approche morpho-stratigraphique du Pléistocène supérieur du Nord de la France : colmatage d'un vallon sec de la Gohelle (Avion, Pas-de-Calais). Quaternaire, Centre National de la Recherche Scientifique, 2006, 17 (3), pp.259-267. ⟨10.4000/quaternaire.861⟩. ⟨hal-01490678⟩

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