When published structure contour maps of the Devonian outcrop, Tully formation, base Hamilton Group, and Oriskany Sandstone are overlain, the locations and trends of anticlinal and synclinal axes are not coincident, suggesting a lack of vertical continuity. The traces of fold axes within these specific stratigraphic units and their vertical orientation are not well defined by previous work.

In order to develop a cohesive, three-dimensional structural model for the Trenton Group (Middle Ordovician) through the Tully formation (Middle Devonian) interval, seismic surveys from six prospect areas in the southern tier were interpreted and well data from over 2,000 wells were...

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