archaeozoic

• Adjectif désuet se rapportant à l'ère géologique la plus ancienne du Précambrien, aujourd'hui remplacée par le terme « Archéen ». Il évoque également ce qui est extrêmement ancien ou primitif.

An obsolete adjective referring to the earliest geological era of the Precambrian period, now replaced by the term 'Archean'.

1. Geological eraC2formalscientific

   Relating to or denoting the earlier of the two divisions of the Precambrian era, characterized by the earliest known rocks and the first signs of life.

   archéozoïque

   • The Archaeozoic era spans from about 4 billion to 2.5 billion years ago.
   • Geologists study Archaeozoic rock formations to understand early Earth.
   • Fossil evidence from the Archaeozoic is extremely rare.

   Synonymesarchaeanarchean

• Nom désignant la plus ancienne ère géologique, couvrant la période allant de la formation de la Terre il y a environ 4,6 milliards d'années jusqu'à 2,5 milliards d'années, caractérisée par la formation des premières roches et l'apparition de formes de vie primitives.

A noun referring to the earliest geological eon, spanning from the formation of the Earth about 4.6 billion years ago to 2.5 billion years ago, characterized by the formation of the first rocks and the emergence of primitive life forms.

indénombrable

1. Geological eonC2formalscientific

   The earliest eon of Earth's history, spanning from about 4 billion to 2.5 billion years ago, characterized by the formation of the Earth's crust and the emergence of the first simple life forms.

   Archéozoïque

   • The Archaeozoic eon is also known as the Archean eon.
   • Rocks from the Archaeozoic era are found in some of the oldest continental shields.
   • During the Archaeozoic, the Earth's atmosphere was very different from today.

   Synonymesarchaeanarchean