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Soil Science Society of America Journal Abstract -

Surface Textures of Quartz in Tropical Soils1


This article in SSSAJ

  1. Vol. 43 No. 2, p. 420-424
    Received: May 15, 1978
    Accepted: Nov 1, 1978

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  1. H. Eswaran and
  2. 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.

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