英语释义

1. any of an extinct class (Graptolithina) of hemichordate colonial marine animals of the Paleozoic era with zooids contained in conical cups along a chitinous support

片语

graptolite grap笔石

graptolite zonation笔石分带

graptolite reflectivity笔石反射率

Graptolite Reflectance笔石反射率

graptolite bed笔石层

Graptolite colony笔石群

graptolite zone笔石带

black graptolite黑色笔石

英汉例句

• the nature of graptolite fauna, the correlation of the graptolite-bearing strata with that in other area and the cambrian-ordovician boundary are also discussed.

  本文还对笔石动物群的性质进行了分析，与邻区和国外相当地层进行了对比，并讨论了本区寒武系与奥陶系界线。

• the optical anisotropy of zooclast graptolite in some paleozoic strata of china has been studied using reflectance cross-plot analysis.

  应用反射率十字图解研究了中国部分地区下古生界地层中动物有机碎屑笔石的光学各向异性。

• the graptolite fauna belongs to the zhujiang sub-form of huanan form with typical characteristics of the pacific graptolite fauna.

  该笔石动物群属于华南型的珠江亚型，具有典型的太平洋型动物群的特点。

• discovery of middle ordovician graptolite beds regarded as cambrian near gongcheng, north of guangxi is first be reported and discussed.

  首次报道和讨论了桂北恭城中奥陶世笔石地层。

• a global correlation of the graptolitic strata of this interval is preliminarily proposed, and the biogeographic distribution of early devonian graptolite species is discussed in the present paper.

  对该时期笔石的生物地理分析表明，洛赫科夫期的笔石具有全球性，而布拉格期的笔石则显示出一定程度的地区性。