archean

• Adjetivo relativo ao Arqueano, o mais antigo éon geológico, ou a algo pertencente a essa época muito antiga; atualmente é usado principalmente como nome próprio na geologia.

An obsolete adjective referring to the earliest geological eon (the Archean Eon), or something belonging to that ancient time; now primarily used as a proper noun in geology.

1. Geological eonC2formalscientific

   Relating to the Archean Eon, the second major division of Precambrian time, spanning from about 4 billion to 2.5 billion years ago, characterized by the formation of the Earth's earliest known rocks and the emergence of primitive life.

   Arqueano

   • The Archean rocks in this region contain some of the oldest minerals on Earth.
   • Geologists study Archean formations to understand the early development of the planet's crust.
   • Fossil evidence from the Archean eon is extremely rare and difficult to find.

   Sinônimosarchaeanarchaeozoicarcheozoic

• Nome próprio que se refere a uma era geológica, o Éon Arqueano, que abrange aproximadamente de 4,0 a 2,5 bilhões de anos atrás, representando o período em que a crosta terrestre se formou e surgiu a vida primitiva.

A proper noun referring to a specific geological eon, the Archean Eon, which spans from about 4.0 to 2.5 billion years ago, representing the time when the Earth's crust formed and early life appeared.

incontável · nome próprio

1. Geological eonC2formalscientific

   The earlier of the two divisions of the Precambrian supereon, spanning from about 4 billion to 2.5 billion years ago, characterized by the formation of the Earth's crust and the appearance of the first life forms.

   Arqueano

   • The Archean eon saw the formation of the first stable continents.
   • Fossils from the Archean are extremely rare due to metamorphism.
   • The atmosphere during the Archean was largely devoid of free oxygen.

   Sinônimosarchaeanarchaeozoicarcheozoic