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Science 26 January 1973:
Vol. 179. no. 4071, pp. 374 - 375
DOI: 10.1126/science.179.4071.374
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Articles

Overbank Sedimentation in the Delaware River Valley during the Last 6000 Years

Dale F. Ritter 1, W. Fred Kinsey III 2, and Marvin E. Kauffman 3

1 Department of Geology, Southern Illinois University, Carbondale 62901
2 North Museum, Franklin and Marshall College, Lancaster, Pennsylvania 17604
3 Department of Geology, Franklin and Marshall College

A thick sequence of floodplain sediments has accumulated in the Delaware River Valley by the process of overbank deposition. Textures in the sediments indicate that the sequence contains no point-bar deposits and is unbroken by periods of erosion. Fourteen radiocarbon dates show that deposition began at least 6000 years ago and has continued to the present. Because the Delaware River shifts its position laterally at a very slow rate, overbank deposition becomes dominant in the construction of its floodplain.


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