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Unconventional Shale Plays in the Lower 48 States

Figure 4.

Unconventional Shale Plays in the Lower 48 States (with federal lands shown); From: Ratner and Tiemann, November 21, 2014, Congressional Research Service; An Overview of Unconventional Oil and Natural Gas: Resources and Federal Actions. Note: federal land coverage is over-generalized in this image.

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