1) Graptolite stratohorizon
笔石层
4) Graptolite biostratigraphy
笔石生物地层
5) graptolite
[英]['græptəlait] [美]['græptəlaɪt]
笔石
1.
Discovery of Early Silurian graptolite fossils in the Qimantag Group in the western sector of the East Kunlun;
东昆仑西段祁漫塔格群早志留世笔石化石的发现
2.
Graphic correlation of graptolite fauna near the Lower/Middle Ordovician boundary in South China
华南下/中奥陶统界线附近笔石动物群的图形对比研究
3.
The Ordovician Dawan Formation of Yichang has been studied for a long time,but the graptolite succession of the formation is still poorly known,particularly due to the rare occurrences of graptolites.
根据宜昌陈家河剖面大湾组的笔石标本,确立笔石序列自下而上为:Didymograptellus eobifidus带、Corymbograptus deflexus带和Azygograptus suecicus带(大湾组下段),Exigraptus clavus带和Undulogr aptusaustrodentatus带(大湾组上段)。
6) Graptolites
笔石
1.
Based on the analysis and study of poptolite fossil data from well Tazhong 29 in Tdrim Basin, it is considered that the geologic time of the graptolites is Middle Ordovician and early Late Oniovician,approximately corresponding to Caradoc in westem Europe.
本文对塔中29井奥陶系含笔石地层的资料作了分析研究。
补充资料：石层
1.重叠的石头;石级。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条