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Marcellus and Utica in the Field

Marcellus and Utica in the Field

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65<br />

The collision of <strong>the</strong> two<br />

“hockey pucks” sets up an<br />

<strong>in</strong>ternal stress field just as<br />

both <strong>the</strong> <strong>Marcellus</strong> black<br />

shale <strong>and</strong> Pottsville coal<br />

enter <strong>the</strong> oil w<strong>in</strong>dow<br />

After Engelder <strong>and</strong> Lash (2008). Tectonic model after Hatcher (2002)

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