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The regional stratotype section and point for the base of the Hirnantian Stage(the uppermost Ordovician) at Mirny Creek,Omulev Mountains,Northeast Russia
Hirnantian regional stratotype graptolites brachiopods NE Russia
2009/10/21
A complete Hirnantian sequence comprising the Normalograptus extraordinarius and N. persculptus biozones is well developed at the Mirny Creek section in the Omulev Mountains. The underlying beds are a...
The succession of Hirnantian events based on data from Baltica:brachiopods,chitinozoans,conodonts,and carbon isotopes
Hirnantian Baltica brachiopods chitinozoans conodonts graptolites carbon isotopes
2009/10/21
The Hirnantian (late Ordovician) environment was complex and dynamic. Understanding the correct order of events and their precise correlation with a time scale are extremely important for the developm...