淡水藻类
Palynomorphs concentrations in the uppermost hard clay were relatively low. Palynological assemblages were relatively humdrum, while the content of freshwater alga was unconventionally high in the uppermost hard clay.
与其上覆地层相比,硬质黏土层中的孢粉、藻类的绝对浓度较低,出现的孢粉、藻类组合较单调,孢粉、藻类组合中淡水藻类含量异常高,并以环纹藻为主。
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