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The AAPG/Datapages Combined Publications Database
Journal of Sedimentary Research (SEPM)
Abstract
Probable Spur-and-Groove Structures in Middle Ordovician Limestone Near Ottawa, Canada: NOTES
Christopher R. Barnes Present address: Department of Geology, University of Wales, Swansea, Wales.
ABSTRACT
a Closely-spaced set of parallel erosional grooves are described from the Ottawa Limestone. They are interpreted as originating in a similar manner to one type of modern spur-and-groove system found in some shallow-water carbonate bank, atoll, and reef areas. The grooves are formed by bottom scour produced by vigorous undertow, possibly as rip-currents, associated with the breaker zone of a shallow sloping shelf. A comparable paleoenvironment is envisaged for these Middle Ordovician structures, which are clearly of value as environmental and paleogeographic indicators.
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