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The AAPG/Datapages Combined Publications Database

Journal of Sedimentary Research (SEPM)

Abstract


Journal of Sedimentary Petrology
Vol. 42 (1972)No. 2. (June), Pages 413-421

Comparison of Ridge and Runnel Systems in Tidal and Non-Tidal Environments

Richard A. Davis, Jr., William T. Fox, Miles O. Hayes, Jon C. Boothroyd

ABSTRACT

Beach and inner nearshore areas of Lake Michigan are basically the same as northern Massachusetts except for scale of the morphologic features and tidal range; in Lake Michigan spring tides reach 0.25 feet whereas in Massachusetts they reach 13 feet. Ridge and runnel topography is developed in the inner nearshore zone at both locations is the result of storm activity. These ridges migrate shoreward during low energy conditions and eventually weld onto the beach. Overall morphology, surface features and internal structures are quite similar in both areas. The only appreciable differences between the two areas are the scale and rate of migration. Apparently tides have no appreciable affect on the sediment sequence that accumulates as ridges weld to the beach although tides are significa t in determining the rate at which the shoreward migration of the ridges takes place.


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