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The Eburonian ((ドイツ語:Eburon) or ''Eburonium''), or, much less commonly, the Eburonian Stage, is a glacial complex in the Calabrian stage of the Pleistocene epoch and lies between the Tegelen and the Waalian interglacial. The transition from the Tegelen to the Eburonian started about 1.78 million years ago, lasted 480,000 years (to 1.3 million years ago), its base marking the boundary between the Neogene and Quaternary deposits of the Netherlands.〔Hey, R. W. ''The Plio-Pleistocene of England and Iceland'' in Van Couvering, John A. (editor), (1997) ''The Pleistocene Boundary and the Beginning of the Quaternary'', Cambridge, Cambridge University Press, p. 183. ISBN 0-521-61702-2.〕 == Discovery == As early as the 1920s, the names of the three well known glaciations - the Elster, the Saale and the Weichselian - had become established at the recommendation of Konrad Keilhack and Paul Woldstedt. After Penck & Brückner successfully identified a fourth glaciation in the Alps, there were many attempts to find traces of this ice age in the northern Central Europe. Investigations in the Netherlands, into both sedimentology and vegetation, revealed that the number of cold and warm periods must have been considerably greater. In 1957 Zagwijn expanded the hitherto known glacials and interglacials (the Weichselian, Eemian, Saalian, Holstein, Elster and Cromer) by the Menapian glacial, Waalian interglacial, Eburonian glacial, Tegelen interglacial and Pre-Tegelen glacial. After the initial view that there had been continuous warm or cold periods, it quickly became clear that we were looking at "complexes" that included both warm and cold periods. The Eboonian was subdivided into four cold periods, each separated from one another by warmer periods. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Eburonian」の詳細全文を読む スポンサード リンク
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