Paleovegetation and paleoclimate changes in middle Pleistocene of inland area of Kanto district, Japan

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  • 関東内陸部における中期更新世の古植生及び古気候～約78万年前から12万年前～
  • カントウ ナイリクブ ニ オケル チュウキ コウシン セイ ノ コショクセイ オヨビ コ キコウ : ヤク 78マンネンマエ カラ 12マンネンマエ

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Abstract

We correlated the records of pollen fossils and mega plant fossils of the Middle Pleistocene inland the Kanto region correlated the marine isotope stage (MIS) and overview the transition of the paleovegetation and the paleoclimate. The MIS 19 and MIS17 were characterized by Quercus subgen. Lepidobalanus pollen fossils, which means that Warm temperate deciduous broad-leaved forest dominated. It the MIS 15 and MIS 13, changed into deciduous broad-leaved forest with temperate coniferous forest, and it is presumed that the climate condition were slightly cool and wet. The MIS 11 was characterized by Quercus subgen. Cyclobalanopisis pollen fossils, which means that the Warm temperate deciduous broad-leaved forest and evergreen broad-leaved forest dominated. It is presumed that the climate condition was warm and dry. In the MIS 9 and MIS 7, it changed to accompany coniferous coniferous forests in the deciduous broadleaved forests. Fagus microcarpa Miki was recorded in MIS 11, but it had been extinct since MIS10. In this study, we clarified that paleovegetation changes of inland area of the Kanto region responded to global climate change in the Middle Pleistocene .

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