Document Type : Research Article
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Abstract
Geomorphologies have an important role in soil genesis and micromorphology. So for survey of pedogenic processes at different levels of geomorphic awareness of soil micromorphology a characteristic is essential. In this study micromorphological properties of soils in the south Roudbar region, part of Jazmoryan area study and affected geomorphology on this properties were investigated. In this study, seven soil profiles in playa and alluvial fans landforms that each of them was divided into several different surface geomorphic dug and samples were taken for preparation of thin sections. Geomorphic surfaces of thin sections in median geomorphic and base of alluvial fans represented clay coating, lenticular and interlocked plates of gypsum crystal and gypsum infilling in by and 2Bt1 horizons. While in the levels of different geomorphic surfaces landform playa were shown gypsum infilling and sporadic clay coating and composed pedofeatures included clay coating and calcite. Toward geomorphic surface playa saline puffy ground was added to lenicular crystals and gypsum microcrystals. The view of clay coating in paleosol according to current climate there is evidence of sufficient rainfall and humid paleoclimate for leaching and transport of clay. Also the presence of composed pedofeatures is indicated polygenetic of these soils. Observation of sporadic clay coating is showed natric horizon in effected of sodium ions diffusion were moved and accumulated. Overall, we conclude that presence of micromorphologic observations is showed paleoclimate and wet and dry periods in the last.
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