The occurrence of Laacher See Tephra in Pomerania, NW Poland |
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| Authors: | É TIENNE JUVIGNÉ ,STEFAN KOZARSKI,BOLESLAW NOWACZYK |
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| Affiliation: | Etienne Juvigné, National Fund for Scientific Research, Belgium, Géomorphologie et Géologie du Quaternaire, Place du XX Aoôt, 7, 4000 Liège, Belgium;Department of Geomorphology, Institute of Quaternary Research, Adam Mickiewicz University, Science Centre PAS, ul. H. Wieniawskiego 17/19, 61–712 Poznan, Poland |
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| Abstract: | ![]()
A millimetre-thick bed of highly vesiculated pumiceous clasts was found in two peat bogs in Pomerania (NW Poland). Their phonolitic composition confirms the correlation with the Laacher See Tephra (LST). Based on the various CaO-Na2O-K2O content, most of these clasts can be linked with the Lower Laacher See Tephra (LLST), and some with the Middle Laacher See Tephra B (MLST-B). 14C dates obtained on peat samples are in agreement with an Allered stratigraphic position of that tephra. In several localities in NW Poland, it was found that there was no occurrence of tephra in peat bogs. Thus the presence of the LST is restricted to the northwestern fringes of Pomerania. |
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