The occurrence of Laacher See Tephra in Pomerania, NW Poland   总被引：1，自引：0，他引：1  

ÉTIENNE JUVIGNÉ  STEFAN KOZARSKI  BOLESLAW NOWACZYK 《Boreas: An International Journal of Quaternary Research》1995,24(3):225-231

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.  相似文献   

Stratigraphy of eolian deposits in Wolin Island and the surrounding area, North-West Poland   总被引：1，自引：0，他引：1  

RYSZARD K. BORÓWKA  PRZEMYSLAW GONERA  RZEJ KOSTRZEWSKI  BOLESAW NOWACZYK  ZBIGNIEW ZWOLI&#;SKI 《Boreas: An International Journal of Quaternary Research》1986,15(4):301-309

Dunes and eolian cover sands play an important role in the morphology of Wolin Island and the surrounding area. From radiocarbon dates, palynological data, archaeological evidence and the study of Swedish maps from 1694, it can be inferred that the above forms accumulated in the Late Vistulian (Older Dryas and Younger Dryas) and Holocene periods, mostly in the Subboreal and Sub-Atlantic periods. The development of eolian processes was due to climatic conditions during the Late Vistulian as well as the Holocene human involvement in the environment of dune-covered areas and the absence of a vegetation cover on sand spits emerging successively from the sea.  相似文献