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The AAPG/Datapages Combined Publications Database
Journal of Sedimentary Research (SEPM)
Abstract
Fore-Reef Petrography of the Silurian Richvalley Reef, Indiana
Albert V. Carozzi, John B. Hunt
ABSTRACT
The microscopic investigation of the inclined fore-reef beds of the Silurian Richvalley reef (developed in the Liston Creek Formation) reveals that they consist of five microfacies. These appear today through the effect of dolomitization as argillaceous dolomites, dolomites, dolomitic calcarenites and calcarenites; however, they all were originally calcarenites.
The statistical investigation of the detrital quartz, the echinoderm fragments, and the general organic frequency allows a bathymetrical classification of the five microfacies indicating that each tongue of fore-reef clastics consists of their juxtaposition in concentric belts. Hence, it is possible to reconstruct the fluctuations of the reef-core margins corresponding to the successive tongues.
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