Abstract |
Hydrogeologic investigations in the outcrop area of the Tombigbee Sand Member, a minor aquifer in the Eutaw Formation, were conducted between Mattubby and Town Creeks in Monroe County, Mississippi. Focal point for the study was a large slump, exhibiting unusual features, along a bluff of the Tombigbee River. Movement of water in soils, alluvium, and terrace deposits, which cover large portions of the outcrop, is important in the ground-water regimen. In the slump area, a small man-made lake has hindered normal drainage down the valley. Near the edge of the bluff constant seepage into joints has increased the moisture content of the sand, and has apparently decreased its shear strength, allowing large blocks to collapse when support is removed. (Author) |