Name of Stratigraphic unit and correlation with Stage Slices:

Diplacanthograptus lanceolatus
Ka1
Ka1
1

Name refers to the following Stratigraphic units:

Opinion Reference

Goldman, D. et al.
2007
The Global Stratotype Section and Point (GSSP) for the base of the Katian Stage of the Upper Ordovician Series at Black Knob Ridge, Southeastern Oklahoma, USA

 

Opinion is based on (if other than Stage Slice: