Devonian | Stratigraphy | Geocollections

Stratigraphy

Devonian

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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
Lower Devonian	D₁	D₁	chronostratigraphy	Series	global	Devonian	419.2	393.3	Devonian
Middle Devonian	D₂	D₂	chronostratigraphy	Series	global	Devonian	393.3	382.7	Devonian
Upper Devonian	D₃	D₃	chronostratigraphy	Series	global	Devonian	382.7	358.9	Devonian

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