L'évolution des nappes alluviales antérissiennes de la Garonne, dans l'avant-pays molassique

Jacques Hubschman (1)

1 GEODE - Géographie de l'environnement

Description and analysis of the Garonne pre-Riss deposits. Mindel alluvial pebble weathering is shown by : strong weathering of crystalline material ; clay formation and argillic development ; genesis of kaolinic minerals but very disorderly ; water-tighting of pebble alluvions. .. Gunz materials are little more weathered but Donau alluvions are extremly weathered, with important amounts of well crystallized kaolinic minerals. Iron-crust genesis and origin of silt cover are discussed.

Keywords: nappes alluviales; Garonne

Domains: Geography; Geophysics [physics.geo-ph]

Jacques Hubschman. L'évolution des nappes alluviales antérissiennes de la Garonne, dans l'avant-pays molassique. Bulletin de l'Association française pour l'étude du quaternaire, 1975, 12 (3-4), pp.149-169. ⟨10.3406/quate.1975.1262⟩. ⟨hal-02736109⟩