Vegetation and its Environment in Denmark in the Early Weichselian Glacial (Last Glacial)

作者：Svend Th. Andersen · 发表于：Danmarks Geologiske Undersøgelse II Række · 年份：1961 · DOI：10.34194/raekke2.v75.6864 · 被引用次数：132 · 研究领域：Geology and Paleoclimatology Research、Botany and Plant Ecology Studies

The present work deals with the layers found above certain Eemian Interglacial fresh-water deposits in Denmark. Earlier investigations at these sites had indicated a "Lower Temperate Stage" and an "Upper Temperate Stage" separated by clay layers ("Middle Bed"). The existence of an upper temperate stage has been doubled by some authors. The "Lower Temperate Stage" is now usually considered the Eemian Interglacial, and the post-Eemian layers have been referred to the Last Glacial of Northern Europe, or the Weichselian Glacial, which may be defined as the time interval, which separated the Eemian Interglacial from the Postglacial. Methods of investigation are described in the chapters II-III. The basis for establishing the pollen diagrams is discussed, and it is maintained that the pollen zones should be considered bio-stratigraphic units. Problems in the identification of pollen grains and spores are discussed, and selected identifications are mentioned briefly. Statistical observations are mentioned in a special part. Chapter IV deals with the individual sites investigated, and their sediments and pollen diagrams. It can be shown that certain layers earlier referred to the "Upper Temperate Stage" contain abundant plant fossils rebedded from the Eemian Interglacial layers, but layers of interstadial character also occur. The segregation of the secondary (rebedded) elements in the fossil floras, and zonation of the pollen diagrams are discussed. The chapter on the earlier vegeta...