Stratigraphy
Keila Stage
25
Stratigraphy
Index
Index add'l
Type
Rank
Scope
Belongs to
Age (Ma)
Age
Base
Top
Laagri Substage
DIIβ
chronostratigraphy
Substage
regional
Keila Stage
Upper Ordovician
Ristna Substage
DIIα
chronostratigraphy
Substage
regional
Keila Stage
Upper Ordovician
25
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