Plant Macrofossil Assemblages in a Latest Early Pleistocene Cold Stage from the Upper Member of the Shobudani Formation, Southwestern Japan

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  • 近畿地方南部， 菖蒲谷層上部層の前期更新世末寒冷期の大型植物化石群
  • キンキ チホウ ナンブ ショウブダニソウ ジョウブ ソウ ノ ゼンキ コウシン

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We described and reconstructed paleovegetation from plant macrofossil assemblages in a latest Early Pleistocene cold stage from the upper member of the Shobudani Formation in Hashimoto and Gojyo, southern Kinki District, southwestern Japan. Trees distributed in the cool temperate and subarctic zones such as Pinus subgen. Haploxylon including P. koraiensis, Picea sect. Picea, Abies including A. veitchii, and Betula platyphylla var. japonica dominated in the fossil assemblages with wetland herbs. The occurrence of A. veitchii, B. platyphyl/a var. japonica, and Pterocarya rhoifolia represent the oldest records in the Quaternary in southwestern Japan. The results show that paleovegetations dominated by subarctic conifers similar to those in the early Middle Pleistocene cold stages were distributed not only in northeastern Japan, but also in southwestern Japan.

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