小南屯冰水堆积物的发现

小南屯砂砾石层成因争论较大。通过孢粉学研究表明:该孢粉组合是以草本植物花粉为主,木本植物花粉为辅。在草本植物花粉中,又以蒿属占绝对优势,加上藜科、禾本科为特征的干燥寒冷气候带的孢粉组合,表明该砂砾石层为冰水堆积物。

DISCOVERY OF GLACIOFLUVIAL SEDIMENT AT XIAONANTUN

There are quite different opinions on the origin of sand-gravel beds at Xiaonantun, Jilin. The study of palynology suggests that the pollen of herbage is dominant and that of xylophyta, secondary in the assemblage of spore-pollen. In the herbal plant, Artemisia occupies a absulte dominant position, associated with the pollen assemblage of lamb's-quarters and grass family indicating cold and arid climate. The facts mentioned above indicate that the sand-gravel bed belongs to glaci of luvial deposit.