2) graptolite zone
笔石带
1.
Nine conodont zones, two conodont assemblage zones and one graptolite zone have been distinguished in a descending order, resulting in the establishment of six stages, i.
首次提供了四川盐边地区从下志留统至下泥盆统连续的志留系年代地层系统的实际证据和原始材料,由上而下建立8个牙形石带,2个牙形石组合带和1个笔石带,以此为依据建立了攀枝花阶、永兴阶、箐河阶、叉河阶、透底河阶和支六阶,分别归入下泥盆统、顶志留统、上志留统、中志留统和下志留统,为我国志留系安康阶以上地层的建阶研究工作提供了实际的基础资料。
3) Etagraptus approximatus biozone
Etagraptus approximatus笔石带
4) Fossil zoning
化石分带
6) 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)。
补充资料：笔分
1.写作的天资秉赋。
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