Marcellus just start of rich Pa. reserves

Natural gas drillers are accelerating exploration of several Appalachian rock formations that sandwich the Marcellus Shale beneath Pennsylvania, and some experts say the new discoveries may be as prolific as the Marcellus itself.

Source: http://www.philly.com/r?19=961&43=166721&44=119550874&32=3796&7=195342&40=http%3A%2F%2Fwww.philly.com%2Finquirer%2Ffront_page%2F20110410_Marcellus_just_start_of_rich_Pa__reserves.html

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