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Geology

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Www.dcnr.state.pa.us/topogeo/oilandgas/images/Marcellus_Isopleth.pdf. Pennsylvania Geological Survey: Marcellus Shale PA. Www.dcnr.state.pa.us/topogeo/pub/pageolmag/pdfs/v38n1.pdf. Marcellus Formation. Geology[edit] Description[edit] Pyrite is especially abundant near the base,[10] and the upper contacts of limestones, but framboidal microcrystals and euhedral crystals of pyrite occur throughout the organic-rich deposits.[11] The Marcellus also contains uranium,[12][13] and the radioactive decay of the uranium-238 (238U) makes it a source rock for radioactive radon gas (222Rn).[14] Extent[edit]

Marcellus Formation

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