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Volcanic RocksLate Ordovician-Early SilurianLate DevonianTrace FossilTrace FossilsEarly CarboniferousLate OrdovicianSedimentary RocksQuartz VeinsGranitic PlutonsMetasedimentary RocksLower PaleozoicCambrian-Lower OrdovicianEarly DevonianBimodal Volcanic RocksAlluvial FanBimodal VolcanicsCarboniferous StrataAppalachian OrogenMantle Component