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Paleo-red Soil on the High Fluvial Surface in the Middle Basin of Nam-Han River  

Kang, Young-Pork (Department of Geographic Education, Chungbuk National University)
Lee, Sang-Min (Department of Geographic Education, Chungbuk National University)
Publication Information
Journal of the Korean earth science society / v.26, no.8, 2005 , pp. 828-835 More about this Journal
Abstract
The purpose of this study is to clarify the landform development of fluvial terrace and the soil characteristics occurring on the terrace deposit. In order to achieve the purpose, the characteristics of soil profiles, the physic-chemical properties of soils that are developed on terrace deposits and X-ray diffraction analysis of clay were investigated. The horizon of Al in the high fluvial surface is silt clay loam of red (2YR 4/6). The soil structure is a developed granular structure. The horizon of B1 is silt clay reddish-brown (2.5YR 4/6). The soil structure is a medium subangular blocky structure. This red soil structure is made on heavy textured and compactly packed parent materials of high terrace sediments and usually has A-B-C profile. In most cases, clay accumulations in B-horizon and clay cutans on ped surfaces are observed, which mean the formation of agrillic horizon. As the result of this study, soils derived from fluvial terrace deposits on high fluvial surfaces are considered paleo-red soil which were developed by pedogenese-strong desilicification and rubefaction and strong leaching of bases- under warmer bio-climatic condition during in the old Pleistocene period.
Keywords
high fluvial surface; paleo-red soils; rubefation; pedogenese;
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