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- W1971036884 abstract "Sedimentological characteristics of aeolian soil parent materials in the Río Sauce Grande basin, southern Buenos Aires province, were analysed using grain-size distributions, transport mechanisms, dynamics of the sedimentary process and the nature of calcareous layers. Samples were collected from C horizon of 13 profiles distributed over all the piedmont areas and plains. Calcium carbonate in these materials is either inherited from the parent material or was redistributed by pedogenic processes. Their amounts in Ck horizons increase from the upper to the lower basin, and are inversely related to the thickness of soil parent material, to mean annual rainfall and to the calcrete depth. The cumulative grain-size plots show that the sediments were transported by both aeolian saltation and aeolian suspension. Most of them have coarser and more heterogeneous grain size distributions than typical loess of the northern hemisphere, indicating a larger and more fluctuating wind energy than is required for the formation of typical loess. Deposits in the upper and middle basins were deposited in two main aeolian episodes which can be related to the dry periods of the Late Pleistocene and the Late Holocene recorded in southern Buenos Aires province. In some thin profiles of the middle and lower basins, the large clay content of the calcic C horizon was probably inherited from one or more previous pedogenic events. There is a systematic increase of particle size towards the lower basin, which may be related to an increase of energy towards the lower basin or to the influence of littoral dune fields along much of the Atlantic coastal zone." @default.
- W1971036884 created "2016-06-24" @default.
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- W1971036884 date "1996-10-01" @default.
- W1971036884 modified "2023-09-27" @default.
- W1971036884 title "Sedimentological study of aeolian soil parent materials in the Río Sauce Grande basin, Buenos Aires province, Argentina" @default.
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- W1971036884 doi "https://doi.org/10.1016/0341-8162(96)00025-2" @default.
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