Stratotype Point Base of Gzhelian

http://resource.geosciml.org/classifier/ics/ischart/BaseGzhelianSP

comment candidates are in southern Urals or Nashui (south China).
correlation event Conodont FAD Idiognathodus simulator (s.str.). Close to FAD of ammonoid Shumardites.
type
StratigraphicPoint original
Resource original
see also index.html original