archaean

• 指地球历史上最早的地质宙，即太古宙，约从40亿年前到25亿年前。

Relating to the earliest geological eon of Earth's history, spanning from about 4 billion to 2.5 billion years ago.

1. Relating to the earliest geological eonC2formalscientific

   Of or relating to the Archaean Eon, the earliest part of the Precambrian, spanning from about 4.0 to 2.5 billion years ago, characterized by the formation of the Earth's first solid crust and the emergence of primitive life.

   与太古宙有关的

   • The Archaean rocks in this region are among the oldest on Earth.
   • Geologists study Archaean formations to understand early planetary history.
   • Fossil evidence from the Archaean eon is extremely rare.

   同义词archaeozoic