The Nemaha Trend-- A System of Compressional Thrust-Fold, Strike-Slip Structural Features in Kansas and Oklahoma, Part 1

From the abstract: Much has been written about the buried Nemaha uplift in Kansas and Oklahoma since drillers and geologists first became aware of it from oil-well drilling in the early years of the twentieth century. It has been described as extensional, compressional, and strike-slip. In this paper I will present data to show that the Nemaha was formed by compressional or thrust faulting that is rooted deep within the Precambrian crust and extended in listric fashion to the ground surface coincident with the Humboldt fault zone, or east-bounding fault. Compressional effects observed from well data and seismic surveys do not permit an extensional origin.