志留纪

The fossil was identified as belonging to the Silurian period.
这个化石被鉴定为属于志留纪时期。
The Silurian rocks in this area reveal a rich variety of marine life.
这片地区的志留纪岩层揭示了丰富多样的海洋生物。
The first land plants appeared during the late Silurian era.
最早的陆地植物出现在晚志留世。
This species of trilobite thrived in the Silurian seas.
这种三叶虫在志留纪的海洋中繁盛。
Fossilized remains from the Silurian period have been found on several continents.
在多个大陆上发现了来自志留纪时期的化石遗迹。
During the Silurian, Earth's atmosphere started to contain significant amounts of oxygen.
志留纪期间，地球大气开始含有大量氧气。
The Silurian period marked a major transition in the evolution of life on our planet.
志留纪标志着我们星球生命演化的重大转变。
Geologists believe that the Great Oxygenation Event occurred towards the end of the Silurian period.
地质学家认为大氧化事件发生在志留纪末期。
Many new and diverse forms of life emerged during the Silurian era.
许多新的和多样化的生命形式在志留纪时代出现。
The Silurian is divided into several sub-periods, each with its own distinct characteristics.
志留纪分为几个亚纪，每个都有自己独特的特征。