http://resource.geosciml.org/classifier/ics/ischart/BaseGzhelianSP
comment | candidates are in southern Urals or Nashui (south China). | |||||
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correlation event | Conodont FAD Idiognathodus simulator (s.str.). Close to FAD of ammonoid Shumardites. | |||||
type |
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see also | index.html original |