Geocollections

Stratigraphy

Middle Cambrian (old nomenclature)

Belongs to	Cambrian
Type	chronostratigraphy
Rank	Series
Scope	global
Status	informal standard
Age top (Ma)	510
Age base (Ma)	521
Age (Ma)	Cambrian
Index	Є₂
Alt. index	Ca₂
Date changed	2014-11-28

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