According to pollen analyses, such marshy plants as Alnus, Salix, Cryptomeria, Gramineae and Nymphaceae are abundant, Lepidobalanus, Castanea and Fraxinus are common, and Fagus cf.

• 孢粉分析显示沼泽植物；如Alnus；Salix；Cryptomeria；Gramineae；Numphaceae丰富；Lepidobalanus；Castanea；Fraxinus常见；而Fagus cf.