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Stratigraphy
Pragian
Belongs toLower Devonian
Typechronostratigraphy
RankStage
Scopeglobal
Statusformal standard
AuthorChlupac & Oliver
Year1989
EtymonPrague, city in Czech Republic
Age top (Ma)407.6
Age base (Ma)410.8
Index
d2
Date added2003-04-03
Date changed2022-11-04
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