Category:Paleozoic shale by country

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Precambrian	Phanerozoic shale by country
Preceded by Proterozoic Eon	Phanerozoic shale by country
	Paleozoic Era						Mesozoic Era			Cenozoic Era
	Cambrian	Ordovician	Silurian	Devonian	Carboniferous	Permian	Triassic	Jurassic	Cretaceous	Paleogene	Neogene	4ry

Subcategories

This category has the following 2 subcategories, out of 2 total.