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Radar~Equencestratigraphy: Anintegratedanalysisofascrollbarcomplex
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 11th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems, Mar 1998, cp-203-00111
Abstract
We have conducted an integrated geophysical survey of a scroll bar complex on the<br>Piscataquis River, near South Sebec, Maine. A sequence stratigraphic interpretation of the radar<br>data shows that the prograding scroll bar complex is composed of clinoforms, which are fining<br>upward successions of point bar sands and silts that top lap into the overbank deposits and<br>downlap onto channel lag deposits that overlie a basal unconformity. The basal unconformity<br>consists of a Pleistocene glacio-marine clay which pinches out onto a glacially eroded bedrock<br>surface. Radiocarbon dating of organic material obtained from cores should provide a<br>chronostratigraphic framework which can be used to reconstruct the three-dimensional evolution<br>of the river channel.