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Stratigraphy
Kurna Subseries
Stratigraphy
Index
Index add'l
Type
Rank
Scope
Belongs to
Age (Ma)
Age
Base
Top
Haljala Stage
CIII/DI
O3HL
chronostratigraphy
Stage
regional
Kurna Subseries458.2456.2
Sandbian
Keila Stage
DII
O3KL
chronostratigraphy
Stage
regional
Kurna Subseries456.2454.2
Upper Ordovician
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