crinoidal limestone是什么意思

用法例句

The Guanling biota is characterized by the occurrence of numerous well-preserved Late Triassic(Carnian)marine reptiles and crinoids with ammonoids,bivalves,conodonts,brachiopods,elasmobranch ichthyoliths and a few fossil fishes and plants.

以产保存完美海生爬行动物和海百合化石为特色,多门类脊椎动物、无脊椎动物共同繁盛,且夹带有少许古植物化石的关岭生物群是世界上极为罕见的珍稀古生物组合。

Recently a rich and well preserved crinoid community has been found in the Late Triassic Wayao Formation in Guanling County, Guizhou Province, China.

在贵州省关岭地区上三叠统瓦窑组地层中发现了保存完好的海百合化石群。

As the oldest class of all known Blastozoan Echinodems, the Eocrinoidea appeared in the early Cambrian and became extinct in the Silurian, and were most diverse during the Cambrian.

始海百合纲(Eocrinoidea)是棘皮动物门海蕾亚门中最为原始的一纲，始现于早寒武世，灭绝于志留纪，繁盛于寒武纪，至今寒武纪始海百合纲化石至少有21属。