Surface Textures of Quartz in Tropical Soils1
- H. Eswaran and
- G. Stoops2
Studies of the surface textures of quartz grains from a range of tropical soils show the appearance of striations, etch features and dissolution pits, increasing in size and/or quantity in the more weathered soil materials. These features show a crystallographic symmetry, most probably related to the crystallographic orientation of the grain.
Monitoring the changes in a 19-m deep weathering profile on granite showed that physical disintegration begins a few centimeters from the fresh rock. Chemical weathernig, which intensifies towards the soil surface, produces etching and dissolution pits. An additional phenomenon observed is the infusion of clayey materials and/or sesquioxides into the void system of the grains.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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