Three thrust blocks, which represent the broken elements of a once continuous thrust sheet, can be used as a model to explain the general structure, sequence of thrusting, and mechanics of thin-skinned tectonics along much of the Allegheny structural front in eastern Tennessee. The master fault developed in Lower Cambrian shale, ramped upward about 1,800 m stratigraphically into Silurian shale, and then cut some 240 m into Upper Mississippian and Pennsylvanian shale. As the sheet moved to the northwest, it broke into three elongate blocks. The structure of each block reflects its position along the thrust prior to movement.

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