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The AAPG/Datapages Combined Publications Database
Journal of Sedimentary Research (SEPM)
Abstract
Composition of Sand Released from Three Source Areas Under Humid, Low Relief Weathering in the North Carolina Piedmont
William R. Mann (2), Victor V. Cavaroc
ABSTRACT
The petrographic composition of sand size sediment released by granitic, micaceous metamorphic, and first cycle sedimentary source areas was investigated in a portion of the North Carolina piedmont province. The region is characterized by a moist climate and low relief, resulting in moderate to heavy chemical weathering of the source rocks.
Despite significant variation between sample sites within source areas, as well as appreciable in situ degradation of the chemically less stable grain types, mineralogical differences between sands from the three sources can be detected. Strong over-riding composition-sediment size relationships however, tend to obscure the differences. These size correlations, which detectably differ between source areas, appear to reflect a characteristic imprint of the source lithology on the sands released by weathering, and themselves may be useful in differentiating the sand's origin.
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