Stratigraphy
Narva Stage
Belongs to
Baltic Middle Devonian
Typechronostratigraphy
RankStage
Scoperegional
Statusformal standard
AuthorObruchev
Year1933
Age top (Ma)384
Age base (Ma)387.5
Age (Ma)
Eifelian
Alt. index
D2NR
Date changed2015-12-22
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