ORIGIN OF SILT/SESQUIOXIDE COATINGS ON SAND GRAINS IN SOME PODZOLIC SOILS OF EASTERN ONTARIO

A micromorphological feature, termed a grain sesquosiltan, was identified in the Bf and BC horizons of some podzols in Eastern Ontario. It is suggested that the inherited or cryogenically-derived dense silasepic fabric has been gradually modified over time by weathering, illuviation and pedoturbation. This has resulted in the formation of silt/sesquioxide coatings around sand grains.