Process and Timing of Exhumation in the Ozark Plateau,
The Ozark Plateau is a 150,000 sq km
intracratonic uplift located in the mid-continent region of the
Research suggests that formation and persistence of the uplift reflects multiple phenomena throughout time. It is not clear whether the present-day elevations are a residual of earlier exhumation or post-Paleozoic exhumation due to renewed movement on border faults. Procedures used to test exhumation models of the Ozarks include computer flexural modeling, and apatite fission track dating to: create a thermal history of the area; learn exhumation history through blocking temps; and constrain the age of the exhumation. Research indicates that a portion of the exhumation is less than 250 m.y.; the renewed displacement may be associated with Cenozoic mid-plate seismicity. By determining the structure of the block, and its exhumation history, we are able to help constrain the different origin theories.