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Slide 2
This illustration is a simplified cross-section of the surface and underground rock strata where gas well drilling generally occurs in West Virginia and the Appalachian Basin.
It does not show all of the scores of horizontal layers of rock (“rock strata”) that lie beneath the surface – like you see when a road is cut through a mountain. It shows those that are most important for gas well drilling, and even those are simplified. There may be several separate strata bearing good and bad groundwater, coal and gas.
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