Yoldia stage - the least clear interval in the Baltic Sea history

Baltica, nr. 8, 5-14 The Yoldia stage has never been properly defined stratigraphically and until now the correlation of its shorelines is confused. Any precise subdivision of the bottom sediments from the Yoldia Sea on the basis of faunal evidence and diatom flora is difficult due to very poor or mixed fauna and flora assemblages. According to recent diatom studies in the Kalmarsund area, there was only a short (100-150 years) influx of salt water during the middle part of the Yoldia stage, which did not reach the open Baltic and the Gulf of Finland.