graptolites meaning in English
笔石类
Examples
- 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。 - During the early silurian , the corals of the erlangping trough and the graptolites of the xichuan shelf belonged to the south china province
在早志留世，二郎坪海槽的珊瑚与浙川陆棚的笔石属华南生物省。