Recent vertical movement of the land surface in the Lake County Uplift and Reelfoot Lake Basin areas, Tennessee, Missouri and Kentucky
Technical Report
·
OSTI ID:6029333
Tiptonville Dome, an established tectonic uplift, is one in a 20 mile series of en echelon topographic highs, most or all of which are uplifts. These fetures are too high to have been flooded during the largest historic floods. During these floods they were temporary islands. From Lewis Prairie, at New Madrid in Missouri, five such topographically high areas extend southward across the Mississippi River to Ridgely, Tennessee. Although separated now due to modern river erosion, they were nearly continuous in 1811. Contour trends reveal a squarish topographic bulge west of the flood islands, the western corner of which is near Portageville, Missouri. It may have been uplifted with, but less than, the flood islands. This bulge and topographic highs comprise the Lake County Uplift. Vertical movement is interpreted from variations in elevation of the alluvial plain surface and old soils. Individual features, datums, and vertical movement are estimated. Ridgely Ridge and Tiptonville Dome in Tennessee correlate with positive gravity anomalies, and small earthquakes are concentrated beneath or near them. Thus, these topographic features may be surface manifestations of deep-seated tectonic movements that continue today. 12 figures, 2 tables.
- Research Organization:
- Vanderbilt Univ., Nashville, TN (USA). Dept. of Geology
- OSTI ID:
- 6029333
- Report Number(s):
- NUREG/CR-0874
- Country of Publication:
- United States
- Language:
- English
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