摘要
利用长江三角洲地区晚第四纪沉积10多口钻井的孢粉、藻类资料,在以往较少见到化石的晚更新世晚期的硬粘土沉积中找到了能明确指示古环境的孢粉、藻类化石,发现了两种不同的孢粉组合,一种是以环纹藻Concentricystes占优势的孢粉组合,另一种是以陆生植物Pinus-Cupressaceae-Picea-Abies-Quercus(deciduous)-Gramineae占优势的孢粉组合,证实了该层硬粘土形成期间曾经历滞水和水退的环境交替过程。
Through the analysis and study about the sporo-pollen and algae from over ten holes of the Late Pleistocene in the Changjiang River delta, we found the fossils of sporo-pollen and algae in the hard clay sediment of the Late stage of the Late Pleistocene, where such kinds of fossils were hardly found before. Those fossils clearly indicate the paleoenvironment. Two polynological assemblages are found, one is dominated by Concentricystes, the other is dominated by Pinus-Cupressaceae-Picea-Abies-Quercus(deciduous)-Gramineae. Both of them prove that the hard clay sediment has come through the alternation of the water's coming and going. Further more, it provides reliable biological fossils for the discussion on the cause and the sediment environment of the hard clay. It is of great significance to study the paleovegetation and paleoclimate, fluctuation of the sea level and variance of the coastline.
出处
《海洋学研究》
北大核心
2005年第2期9-16,共8页
Journal of Marine Sciences
基金
国家自然科学基金资助项目(40276021
40146024)
国家海洋局海底科学重点实验室基金资助项目(2003-1)
华东师范大学河口海岸重点实验室基金资助项目(200303
200501)
关键词
长江三角洲
晚更新世
孢粉组合
the Changjiang River delta
Late Pleistocene
polynological assemblage
