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In his models, half the shoreline currents were bimodal. Selley (1968) considered six models of shoreline current systems in which net sediment transport was onshore, offshore, and longshore. Klein (1967) concluded from his analysis of modern sediment dispersal patterns that marine environments are characterized by diverse directions of current flow that may be independent of source and slope. This is due, at least in part, to the fact that paleogeographic significance of marine cross bedding is poorly understood. These data indicate that marine paleocurrent systems during deposition of limestones of the Kansas City Group moved back and forth perpendicular to the shore and were probably the result of ebb and flow of tides.ĭirections of cross bedding have been studied extensively in many sandstones throughout the geologic column, but few attempts have been made to measure and interpret their significance in limestones. Cross bedding in associated sandstones, in contrast, is unimodal, with the average direction trending to the southwest in Kansas, west and northwest near the Oklahoma-Kansas state line, and northward in south-central Oklahoma. The strike of megaripples In these deposits is normal to these trends. In each unit the primary mode to the southwest, whereas the secondary mode is in the opposite direction. The information has not been updated.Ĭross-bedding directions in limestones of the Kansas City Group have a bimodal distribution on both a local and regional scale. This is, in general, the original text as published. Originally published in 1959 as Kansas Geological Survey Bulletin 194, part 2. Marine Paleocurrent Directions in Limestones of the Kansas City Group (Upper Pennsylvanian) in Eastern Kansas by W. Kansas Geological Survey, Bulletin 194, part 2, originally published in 1969 194, part 2-Paleocurrent Directions in Limestones of the Kansas City Group, Eastern Kansas