摘要
本文根据长江三角洲地区7个钻孔的介形虫化石群古生态的研究成果,并参考有关资料,讨论了该区第四纪海相介形虫的时、空分布及其古环境。文中指出,海相介形虫的分布与该区第四纪海侵层有关,它在距今约0.30Ma形成的海侵层中富集,上述结论与对中国东部沿海平原海平面研究所取得的认识(第四纪高海面仅在0.30Ma以来才表现明显)相一致。该区介形虫化石群的成分较渤海西岸稍多,可能与该地区易受外海影响有关;而它又比广东、福建、香港的化石群简单,这可能是气候、水温差异的表现。
Based on the study of Quaternary marine Ostracoda collected from seven drilling holes in the Changjiang (Yangtze) River Dekta, the distribution of these fossils in time and space and the paleoenvilonmental significance have been discussed in this paper. The distribution of these ostracods was controlled by the transgressional layers. They were majorly found in the beds formed at 0.30Ma B. P. and rarely in the beds of the early-middle Quaternary. This situation is identical with the elevation of the sea-level in the coastal plain of eastern China, i. e. the highest sea-level only appeared at about 0.30Ma B. P. The elements of the ostracod fauna are more than that from the western coast of the Bohai Sea, it may be due to the position of this area where was nearer to the open sea and more easilly influenced by it. But this fauna is more simple than those of Fujian, Guangdong and Hong Kong, it reflects the differences of climates and water-temperature.
出处
《地球学报》
EI
CAS
CSCD
1991年第3期79-84,共6页
Acta Geoscientica Sinica
