graptolites

Application of correspondent analysis and cluster analysis to the classification of graptolites

对应分析和聚类分析在笔石分类中的应用

Study of reflectance for the graptolites from lower Yangtze region in jiangsu , e China

江苏下扬子区笔石反射率研究

The Application of Quantification Theory to the Research on Geographical Distribution of Early Ordovician Graptolites in China

数量化理论在中国早奥陶世笔石动物地理分布研究中的应用

Study of the reflectance cross-plot of optical structure of graptolites in China

笔石光学结构的反射率十字图解研究

Vision of West China Lower Silurian graptolites of wuwei , anhui Province

安徽无为西部下志留统笔石

Late Ordovician graptolites first discovered in Shanghai

上海晚奥陶世笔石的发现

And it is also considered that the ecological variation of graptolites is controlled mainly by surface water temperature rather than geographical barrier .

并认为这一时期笔石的生态差异主要受温度的控制而非地理阻隔的影响。

Material illustrating detailed structure of graptolites has been etched from limestone by means of hydrofluoric acid .

表明笔石详细构造的物质是利用氢氟酸从石灰岩中侵蚀出来。

Upper Ordovician graptolites from baoshan , western Yunnan

云南保山上奥陶统笔石

Interpretation of the proximal development and branching divisions of some early and Middle Ordovician graptolites based on BSE images

利用背散射电子（BSE）研究奥陶纪部分笔石的始端发育和分枝方式

In the south area , there are mainly flysch and deep sea facies fossil , such as Graptolites in fossil feature .

南区岩性为复理石建造，生物以深海相笔石为主。

Lower Devonian graptolites from Yunnan

云南泥盆纪笔石

Some questions in graptolite reflectivity test Early Silurian graptolites from southwestern Henan the graptolites of early upper Silurian from Northwestern China

笔石反射率测试中的若干问题