Category:Intrusions (geology) in Pennsylvania by geochronology

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Precambrian	Phanerozoic intrusions (geology) in Pennsylvania
Preceded by Proterozoic Eon	Phanerozoic intrusions (geology) in Pennsylvania
	Paleozoic Era						Mesozoic Era			Cenozoic Era
	Cambrian	Ordovician	Silurian	Devonian	Carboniferous	Permian	Triassic	Jurassic	Cretaceous	Paleogene	Neogene	4ry

Subcategories

This category has the following 4 subcategories, out of 4 total.