摘要
化石采自浙江天台嵊县组.该地层含丰富被子植物压型化石及少量裸子植物化石.利用叶结构分析法,依据叶脉、叶尖、叶基等稳定性特征,对一种樟科植物化石的宏观形态进行了详细的研究;结合表皮特征分析,发现该化石与现生Cinnamomum bejolghota(Buch-Ham.)Sweet在叶形、叶脉特征以及表皮脉络细胞特征、气孔器类型和毛基特征等方面均很相似,因而将当前化石定名为Cinnamomum cf.bejolghota(钝叶桂相似种).通过分析化石钝叶桂的角质层微细构造特征,结合现生钝叶桂的分布范围和生存环境恢复了浙东地区中新世的古气候和古环境特征,推测当时的气候比现在更为炎热多雨,同时认为钝叶桂从中新世至今有南迁的趋势.
Leaf fossils are collected for this study from the Shengxian Formation in Tiantai, Zhejiang Province. There are abun- dant compressed angiosperm fossils and a few gymnosperm fossils in the Shengxian Formation. Based on steady macromorphol- ogy of leaf including the base, the apex, the vein and so on, one species of Lauraceae plant fossils is studied in detail by analy- zing the leaf architecture and cuticle characteristics in this paper. The fossil leaves and living Cinnamomum bejolghota （Buch- Ham. ） Sweet are found sharing resemblance on the leaf shape, leaf vein, vein cell, stomata type and the features of trichomes. So the fossil leaves are identified as Cinnamomurn bejolghota. Based on cuticle characteristics of fossil leaves and the distribu- tion area and survival environment of living Cinnamomurn bejolghota, we come to the following conclusions on the paleoclimate and paleoenviroment in eastern Zhejiang, that it was hotter and moister than present, and the distribution area of Cinnamornum bejolghota moved southward from Miocene.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
2013年第3期461-470,共10页
Earth Science-Journal of China University of Geosciences
基金
国家重点基础研究发展计划"973"项目(No.2012CB822003)
国家自然科学基金(No.41172022)
高等学校博士学科点专项科研基金(No.20100211110019)
现代古生物学和地层学国家重点实验室(中国科学院南京地质古生物研究所)开放基金(No.093110)
关键词
植物化石
角质层特征
浙江东部
中新世
嵊县组
地层学
plant fossils
cuticular microstructure
eastern Zhejiang
Miocene
Shengxian Formation
stratigraphy.
