Geocollections

Permian

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Stratigraphy	Index	Index add'l	Type	Rank	Scope	Belongs to	Age (Ma)		Age
Stratigraphy	Index	Index add'l	Type	Rank	Scope	Belongs to	Base	Top	Age
Cisuralian	P₁		chronostratigraphy	Series	global	Permian	298.9	273.0
Guadalupian	P₂		chronostratigraphy	Series	global	Permian	273.0	259.5
Lopingian	P₃		chronostratigraphy	Series	global	Permian	259.5	251.9

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