摘要
山东章丘巴漏河组和上覆更新统孢粉植物群研究表明 ,当地上新世植物群的分布类型趋于单调 ,草本植物和部分广布型植物繁盛 ;更新世植物群的成分变得更加贫乏 ,其中 ,第三纪常见的喜暖类型已全部消失 ,而广布型植物类型得以进一步发展。植物群所反映的气候较中新世趋于干冷 ,与我国华北地区晚第三纪以来植物群的总体发展规律相一致。巴漏河组在层位上与临朐和昌乐等地的尧山组相对比 ,当前研究表明 ,以往报道的尧山组底部沉积夹层中的孢粉组合 ,其时代与山旺组相接近 ,而不同于巴漏河组 ;孢粉证据支持将其归于山旺组的划分意见。通过比较 。
Palynofloras from the Balouhe Formation and its overlying Pleistocene in the Zhangqiu County of Shandong (36°43′ N、117°27′ E) show changes in the plant components and their reflected climate from the Pliocene. Palynoflora in the Pliocene is more or less monotonous, mainly represented by herbaceous and eurychoric plants. The Pleistocene flora displays a further impoverished plant community when some Tertiary warm elements totally disappeared, while the herbaceous and eurychoric plants got further developed. Climate reflected by the floras exhibits a changing tendency of drying and cooling, which is mostly comparable with the overall change process in the Neogene of North China. The Balouhe Formation is chronologically correlated to the Yaoshan Formation in the Linju and Changle areas of Shandong. This study reveals that pollen assemblage from the intercalated sedimentary bed at the bottom of the Yaoshan Formation is more comparable with the one from the Shanwang Formation rather than the one from the Balouhe Formation. Evidence from the pollen data supports the proposal to put this intercalated sedimentary bed into the Shanwang Formation. A palynological correlation is established between the Balouhe Formation and the upper part of the Minghuazhen Formation from the core section in North Shandong.
出处
《古生物学报》
CAS
CSCD
北大核心
2002年第1期72-76,共5页
Acta Palaeontologica Sinica
基金
国家重点基础研究发展规划项目 (G2 0 0 0 0 7770 0 )
国家自然科学基金重点项目 (No .39930 0 2 0 )
中国博士后科学基金
国家自然科学基金委员会基础科学人才培养基金资助课题
关键词
孢粉植物群
气候意义
地层
巴漏河组
更新统
山东
上新世
Palynofloras, Stratigraphical and climatic significance, Balouhe Formation and Pleistocene, Shandong
