Great Smoky Thrust at White Oak Sink by Charles Carrigan

The Great Smoky thrust fault is the boundary of the Blue Ridge province. It places the Precambrian metamorphic rocks on top of the Ordovician Knox Group limestones. Near & within Great Smoky Mountain National Park, the fault is exposed in several erosional windows. Here at Tuckaleechee Cove, a small creek flows over the Precambrian rocks until it reaches White Oak Sink, where it cascades down into a cave. The Great Smoky Thrust can be seen behind the waterfall.