Marcellus Shale Outcrop in Highland County, Virginia
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A Marcellus Shale outcrop in Highland County, Virginia, shows at the surface the object of shale gas development drilling in nearby states. Assessing undiscovered gas resources, like the USGS 2011 assessment of the Marcellus Shale, uses geologic mapping of outcrops like this in addition to extensive drilling, production, and geophysical data.
Image Dimensions: 807 x 468
Location Taken: Highland County, VA, US