Alterations in Chemical Composition during the Progressive Weathering of Dwyka Tillite and Dolerite in ' Natal
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چکیده
Description of Materials Soil profiles developed from Dwyka tillite consist of a fine sandy loam overlying a gravel and rubble layer and succeeded by a zone of clay illuviation. Below this, the disintergrating tillite may proceed to depths of two hundred feet under favourable circumstances. This material in its most weathered aspect consists of a "soapy" orangy yellow fine silty clay of the following textural composition: Coarse sand 10 per cent, fine sand 30 per cent, silt 20 per cent and clay 40 per cent. Where conditions for weathering are not favourable, that is, the absence of preAnalytical Results
منابع مشابه
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