Stratigraphy
Katian
25
Stratigraphy
Index
Index add'l
Type
Rank
Scope
Belongs to
Age (Ma)
Age
Base
Top
Oandu Stage
DIII
O3ON
chronostratigraphy
Stage
regional
Vinni Subseries454.2453.2
Katian
Rakvere Stage
E
O3RK
chronostratigraphy
Stage
regional
Vinni Subseries453.2452.0
Katian
Nabala Stage
FIa
O3NB
chronostratigraphy
Stage
regional
Kohila Subseries452.0450.8
Katian
Vormsi Stage
FIb
O3VR
chronostratigraphy
Stage
regional
Kohila Subseries450.8449.8
Katian
Pirgu Stage
FIc
O3PRG
chronostratigraphy
Stage
regional
Atla Subseries449.8445.6
Katian
Vinni Subseries
chronostratigraphy
Subseries
regional
Viru Series454.2452.0
Katian
Voore Group
DIII-FIaV
lithostratigraphy
Group
regional
Baltic lithostratigraphy (Ordovician)
Katian
25
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