Central Mississippi Uplift: ABSTRACT

Abstract

A structural feature in east-central Mississippi covers more than 1,500 sq mi. The subcrop of the lower Paleozoic carbonate defines the feature, which is named the Central Mississippi uplift. Structural and isopach maps and a Paleozoic paleogeologic map show the configuration and age of the uplift. More than 10,000 ft of Mississippian-Pennsylvanian sediment was removed from the uplift during Triassic and Jurassic time. The southern part of the uplift was downwarped during formation of the Mississippi salt basin, and its End_Page 1787------------------------------ southern extension is deeply buried and unknown. A down-to-the-southwest fault system had been suggested previously as the updip limit for much of the early Mesozoic sequence along the northwestern edge of the salt basin. However, 4 seismic profiles show the loss of section to be primarily the result of thinning and convergence of beds. Jurassic deposition was affected by the uplift, which served as a source for clastic material. End_of_Article - Last_Page 1788------------