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Marcellus Shale
Organically rich shale unit of middle Devonian age located in the Appalachian region of the eastern United States. Recently the source of natural gas production made economically viable through the use of lateral drilling and hydraulic fracturing techniques.
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Shale(instance of)
A laminated, indurated rock having more than 67% clay-sized minerals.
Devonian(age of formation)
Natural gas resources(produces)
Stocks of naturally formed hydrocarbon gases which are usually associated with petroleum fields. Useful for heating, they are principally methane, but can be ethane, butane, or propane.
Petroleum(produces)
Naturally occurring hydrocarbons, typically fluid or gas, often of economic use. Includes oil, natural gas, and asphaltic compounds found in tar sands and oil shales.
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