Lower Silurian的用法和样例：
例句
- 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。 - Early Silurian sedimentary rocks in Sichuan area were formed in the foreland basin stage during the period from the Late Ordovician to the Early Silurian.
摘要四川地区早志留世沉积岩系形成于晚奥陶世一早志留世的前陆盆地演化阶段。
