Sand Grain Micromorphology and Soil Age
1981
White, Kenneth L.
The micromorphology of quartz grains (0.5 to 1.0 mm) from three soils developed in granitic alluvium were studied using scanning electron microscopy. The soils are located on riverine terraces in southern California. The soils have been dated as 22,000, 44,000, and 63,000 years before present (YBP). The grains are dominated by solution/precipitation features. The samples from the A horizons are quite similar. Grains from the lower B horizons display an increasing complexity of features with advancing age. The C horizons from the older terrace yield the most diagenetically altered grain surfaces. Age in fact, appears to have greater significance than change in soil texture or water holding capacity.
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