Выпуск: 75 , Год издания: 1993

Место издания: Hamburg

New data from different revised sequences in Arctic Siberia (Okhotsk region, Omolon basin, East Taimyr) and from the Svalbard Archipelago has lead to a better understanding of the biostratigraphy of the Ladinian-Carnian transition of the boreal province. For the latest Ladinian a new zone, that of Nathorstites lindstroemi is proposed which does not correlate exactly with the Frankites sutherlandi zone of NE - British Columbia. It cannot be excluded that the Middle/Upper Triassic transition is not continuous in North Canada as previously supposed. The Stolleyites tenuis zone of the lowermost boreal Carnian can be divided into two subzones, at least in sections of the Okhotsk Sea (Yana River) and Eastern Spitsbergen. Precise correlation of the Tenuis zone with the Trachyceras desatoyense zone of British Columbia is still not possible until now.