福建惠安城关龙海组泥炭孢粉组合

PALYNOLOGICAL ASSEMBLAGE FROM THE PEAT BEDS OF THE LONGHAI FORMATION IN HUI'AN COUNTY, FUJIAN

福建省沿海平原龙海组沉积物分布广泛,其位置多在河流二级阶地或埋藏在全新统之下。1979年福建省水文地质工程地质队在调查沿海第四纪地质时,曾在惠安县城关山兜村白太阳山东坡大沙河的二级阶地上发现一泥炭层。为进一步探讨龙海组沉积的地质时代、古植被和气候,笔者系统采集该泥炭剖面孢粉样21块,其中含孢粉的样品5块,共找到34科48属花粉和孢子。

The present paper deals with the spores and pollen grains obtained from the peat beds of the Longhai Formation in Hui’an.The palynological assemblage is characterized by the dominance of herbaceous pollen,the relative abundance of pteridophytic spores and gymnospermous pollen.It mainly includes the members of Gramineae,Artemisia,Compositae,Pinus,Cupressaceae,Polypodiaceae,and Pteridium etc,reflecting the herbaceous vegetation under the cooldry climate.Based on 14C dating,the peat beds studied belongs to the Late Pleistocene.