Detachment folds and triangle zones: Unexplored hydrocarbon potential along eastern Cumberland escarpment, Tenn.

07/28/2003
An 80 km-long unexplored subsurface detachment fold, the Eureka structure, exists in the southern Appalachian thrust belt just east of the Cumberland escarpment in eastern Tennessee.The Eureka structure involves Ordovician and older rocks that are productive elsewhere in eastern Tennessee, Kentucky, Ohio, and Virginia, and here lie within the oil-gas window.The eastern Cumberland Plateau escarpment rises 400 to 600 m at the western boundary of the Valley and Ridge in eastern Tennessee. Isolated oil and gas wells and industry seismic reflection lines provide subsurface geologic data and resolution of structural geometry beneath the escarpment.Seismic lines reveal a deep 80 km-long detachme...
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