permian

• 专有名词，指地质历史上的二叠纪，约距今2.99亿至2.52亿年前，以爬行动物多样化和超大陆盘古大陆形成为特征。

A proper noun referring to a geological period that lasted from approximately 280 to 230 million years ago, known for the diversification of reptiles and the formation of the supercontinent Pangaea.

不可数 · 专有名词

1. Geological periodC1formalscientific

   The last period of the Paleozoic Era, lasting from about 299 to 251 million years ago, known for the diversification of reptiles and the largest mass extinction event.

   二叠纪

   • The Permian period ended with the most severe extinction event in Earth's history.
   • Fossils from the Permian show a great diversity of early reptiles.
   • The supercontinent Pangaea was fully formed during the Permian.