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Stratigraphy
Jonstorp Formation
Belongs toBaltic lithostratigraphy (Ordovician)
Typelithostratigraphy
RankFormation
Scoperegional
Statusformal standard
AuthorJaanusson
Year1963
Age (Ma)Pirgu Stage
Index
FIcJ
Alt. index
O3jn
Date added2011-07-02
Date changed2014-11-27
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