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The AAPG/Datapages Combined Publications Database
Journal of Sedimentary Research (SEPM)
Abstract
Sedimentology of Southwestern Roads Region, U.S. Virgin Islands-Origin and Rate of Sediment Accumulation
Jack L. Kindinger, Ronald J. Miller, Charles W. Holmes
ABSTRACT
Sand deposits on the southern insular shelf of St. Thomas, U.S. Virgin Islands, were investigated to determine their origin and to relate origin to environmental processes and accumulation rates. Analysis of sea-floor samples for composition shows that the sand has been derived (in situ) mainly from calcareous algae and molluscs. Zonation of the dominant sand producers is related to the present environmental setting; water depth has the greatest influence. Carbon-14 data (bulk sample) of cores indicate accumulation rates of slightly less than 1 mm/year for the last 5,000 years. Faunal studies show that the climate has remained constant over the past 5,000 years. The only changes in environmental conditions appear to have been an increase in water depth, changes in the patterns of wate movement, and an increase in water temperature.
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