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Science 7 October 1983:
Vol. 222. no. 4619, pp. 49 - 50
DOI: 10.1126/science.222.4619.49
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Articles
Alluvial-River Response to Neotectonic Deformation in Louisiana and Mississippi
A. W. BURNETT 1 and
S. A. SCHUMM 1
1 Department of Earth Resources, Colorado State University, Fort Collins 80523
Repeat geodetic surveys show uplift of the Monroe and Wiggins anticlines in Louisiana and Mississippi. There are deformed Quaternary terraces, which indicate long-term deformation in the valleys of the alluvial rivers that cross these structures, and there are floodplain and channel convexities that provide evidence of modern deformation. In addition, the channels show significant variations of morphology (sinuosity, gradient, and depth) and behavior appropriate to reaches of increased and decreased valley slope. These alluvial rivers are adjusting to modern deformation and their adjustment confirms two geodetic leveling anomalies.
Submitted on March 13, 1983
Revised on May 23, 1983
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