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lower Silurian

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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
Juuru Stage	G_1-2	S₁JR	chronostratigraphy	Stage	regional	lower Silurian	443.7	441.0	Rhuddanian
Raikküla Stage	G₃	S₁RK	chronostratigraphy	Stage	regional	lower Silurian	441.0	436.7	Llandovery
Adavere Stage	H	S₁AD	chronostratigraphy	Stage	regional	lower Silurian	436.7	428.2	Llandovery
Jaani Stage	J₁	S₁JN	chronostratigraphy	Stage	regional	lower Silurian	428.2	427.0	Sheinwoodian
Jaagarahu Stage	J₂	S₁JG	chronostratigraphy	Stage	regional	lower Silurian	427.0	424.6	Wenlock
Rootsiküla Stage	K₁a	S₁RT	chronostratigraphy	Stage	regional	lower Silurian	424.6	422.7	Homerian

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