Name of Stratigraphic unit and correlation with Stage Slices:

Pygodus serra
Dw3
Dw3
1

Name refers to the following Stratigraphic units:

Opinion Reference

Bergström, S.M
2009
The new chronostratigraphic classification of the Ordovician System and its relations to major regional series and stages and to δ13C chemostratigraphy

 

Opinion is based on (if other than Stage Slice: