Allegheny Formation

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11	Moraine and McConnells Mill State Parks, Butler and Lawrence Counties—Glacial lakes and drainage changes Add to Reading List Source URL: www.dcnr.state.pa.us Language: English - Date: 2013-02-21 15:30:04 Geology of Pennsylvania Geology of West Virginia Sandstone Siltstone Pittsburgh metropolitan area McConnells Mill State Park Slippery Rock Creek Allegheny Formation Muddy Creek Geography of Pennsylvania Pennsylvania Geography of the United States
12	PDF Document Add to Reading List Source URL: pubs.usgs.gov Language: English - Date: 2004-07-21 08:44:50 Geography of the United States Geology of West Virginia Sandstone Siltstone Coal Black Warrior Basin Coalbed methane Allegheny Formation Pottsville Formation Geology Sedimentology Geology of Pennsylvania