Схема Блитта — Сернандера: различия между версиями

В настоящее время флуктуации климатических изменений считаются более сложными, чем их представляет схема Блитта-Сернандера. Например, в недавно исследованных peat [[core sample]]s at [[:en:Roskilde Fjord]] and also [[:en:Lake Kornerup]] in [[Дания]] identified 40 to 62 distinguishable layers of [[пыльца]], respectively. Тем не менее, до настоящего времени не предложено более убедительной альтернативной теории.

 

 

Today the Blytt-Sernander sequence has been substantiated by a wide variety of scientific dating methods, mainly [[Radiocarbon dating|radiocarbon]] dates obtained from peat. Earlier radiocarbon dates were often left uncalibrated; that is, they were derived by assuming a constant concentration of atmospheric radiocarbon. In fact the atmospheric radiocarbon concentration has varied over time and thus radiocarbon dates need to be [[Radiocarbon dating|calibrated]].

 

The Blytt-Sernander classification has been used as a temporal framework for the [[archaeology|archaeological cultures]] of [[Europe]] and [[United States|America]]. Some have gone so far as to identify stages of technology in north Europe with specific periods; however, this approach is an oversimplification not generally accepted. There is no reason, for example, why the north [[Europe]]ans should stop using [[bronze]] and start using [[iron]] abruptly at the lower boundary of the [[Subatlantic]] at 600 BC. In the warm [[Atlantic (period)|Atlantic]] period, [[Denmark]] was occupied by [[Mesolithic]] cultures, rather than [[Neolithic]], notwithstanding the climatic evidence. Moreover, the technology stages vary widely globally.