Shale Gas in the United States

Pathways that convert living organisms to organic carbon. (Adapted from Chilingar, G.V. and Yen, T.F., Eds., Bitumens, Asphalts, and Tar Sands, Elsevier, Amsterdam, 1978.) 

Kerogen is a mixture of organic chemical compounds that make up a portion of the organic matter in sedimentary rocks. Some types of kerogen release crude oil or natural gas, depending on how each is heated within the Earth s crust. 

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IHS. (2011). The Economic and Employment Contributions of Shale Gas in the United States. IHS Global Insight, Englewood, CO (www.ihs.com/ EconomicContributionofShaleGasintheUS). 

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