Abstract
Abstract This paper discusses the morphological, physical, chemical, mineralogical and micromorphological properties of two Late Pleistocene-Holocene soil/paleosol sequences. They are located in the NW region (Sandy Pampa) of Buenos Aires province, Argentina. The soil profiles are complex; they are developed on sandy loess and have lithologic discontinuities and buried soils including fragipans. Two buried geosols with argillic horizons and an incipient, recently buried geosol have been found under the surface horizon. The paleosols with Bt horizons reflect humid paleoclimatic conditions similar to those prevailing at present. The deeper one has fragipan properties whose development has been favored by a loamy particle-size class, clay and clay-silt bridges, interlocking grains and a moderate calcification process.
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