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Lithological indicators of discontinuities in mountain soils rich in calcium carbonate in the Polish Carpathians

Journal of Mountain Science 2020年第5期17卷 1058-1083页

作者： Joanna Beata KOWALSKA Bartlomiej KAJDAS Tomasz ZALESKI Depatment of Soil Science and Agrophysics University of AgricultureAl.Mickiewicza 2131-120 KrakowPoland Natural Science Education Centre Jagiellonian UniversityGronostajowa 530-387 KrakowPoland

Six soils located within the Polish Carpathians,developed on calcium carbonate–rich sedimentary parent materials and representing various reference groups,were investigated in order to detect the lithic *** propose using a multidirectional approach to assess the lithic discontinuity in these soils,one that includes grain size distribution,geochemical composition,heavy mineral content and micromorphology,supported by a traditional soil survey.A further aim of this process was to identify the possible admixture of allochthonous material of aeolian *** studied soils presented lithic discontinuities mostly at the contact of underlying calcium carbonate–rich coarsegrained slope deposits with the overlaying colluvium layer having a lower content of rock *** significant changes in grain size distribution,especially in the silt and sand content,as well as high uniformity values and partially,high Lithological Discontinuity Index values,confirmed the occurrence of a lithic discontinuity in all studied *** heterogeneity in the soil profiles was also confirmed by the distribution of the major oxides;however,their distribution did not clearly indicate the lithic *** most visible distinctions were noted from CaO content,which resulted from the deposition of carbonate-free materials(aeolian silts)and their mixing with the calcium carbonate–rich parent ***,the analysis of heavy mineral content confirmed the allochthonous origin of the upper(and in some cases also the middle)parts of all profiles,which was manifested by the presence of highly weathering-resistant minerals such as zircon,epidote and various types of *** micromorphological features of some of the studied soils showed distinctiveness within the soil profile,manifested by changes in b-fabric pattern,the occurrence and distribution of secondary carbonate and the coarse and fine coarse and fine *** on the high content of silt within the u

关键词： Lithic discontinuities Heavy minerals Geochemistry Slope processes Micromorphology uniformity values

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