These include the Barnett Shale, around DallasāFort Worth, Texas; the Fayetteville Shale, mainly in northern Arkansas; the Woodford Shale, mainly in Oklahoma; and the Haynesville Shale, straddling the Texas-Louisiana state line. The Barnett Shale was the proving ground of horizontal drilling and fracking starting in the 1990s; moreā¦
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