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Terrace Studies and Landscape Disquilibrium in Eastern James River Basin Virginia Piedmont
Turcotte, John L.
Turcotte, John L.
Abstract
We present correlated terrace profiles and stream valley profiles for the James River from the central Piedmont to the Fall Zone in Richmond. Our findings link two distinct terrace levels mapped in previous study to the fall zone. T1 strath levels are ~60 m above the modern river level while the T2 strath is at an elevation of approximately 35m above the modern river. The connection of these terrace levels in the downstream direction indicates that similar basin wide disequilibrium conditions interpreted from terrace ages of terraces up stream exist. In addition, the T2 terrace level presents a ~30m thick deposit with a top, upper tread surface and a lower cut in surface indicating a significant period of aggradation between incision events.
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2004-01-01
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Geology