Geocollections

Stratigraphy

Ordovician

Belongs to	Paleozoic
Type	chronostratigraphy
Rank	System
Scope	global
Status	formal standard
Author	Lapworth
Year	1879
Etymon	Ordovices, a northen Celtic Welsh tribe
Age top (Ma)	443.8
Age base (Ma)	485.4
Age (Ma)	Paleozoic
Index	O
Alt. index	O
Date changed	2022-11-04

Locality	Type	From (m)	To (m)	Reference	Remarks
Green Point Section, western Newfoundland	boundary stratotype		101.8	Cooper et al., 2001	GSSP for the Tremadocian Stage

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