Delaware and Lehigh National Heritage Corridor Where America was Built ™ Fact Sheet: The Formation of Coal Geologic Time Scale Years

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Date: 2015-06-12 14:37:00 Organic minerals Chemistry Geography of Pennsylvania Pennsylvania Anthracite Coal Coal mining Carbon Delaware and Lehigh National Heritage Corridor		Delaware and Lehigh National Heritage Corridor Where America was Built ™ Fact Sheet: The Formation of Coal Geologic Time Scale Years Add to Reading List Source URL: delawareandlehigh.org Download Document from Source Website File Size: 226,44 KB Share Document on Facebook

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