archean

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.

• 🇩🇪Veraltetes Adjektiv, das sich auf das früheste geologische Zeitalter (das Archaikum) oder auf etwas aus jener uralten Zeit bezieht; wird heute in der Geologie hauptsächlich als Eigenname verwendet.

1. Geological eon C2 formal scientific

   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.

   • 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.

   🇩🇪archaisch

   Synonyme: archaeanarchaeozoicarcheozoic

unzählbar · Eigenname

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.

• 🇩🇪Der Eigenname bezeichnet das Archaikum, das älteste Äon der Erdgeschichte, das den Zeitraum von etwa 4,0 bis 2,5 Milliarden Jahren vor heute umfasst, in dem sich die Erdkruste bildete und frühes Leben entstand.

1. Geological eon C2 formal scientific

   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.

   • 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.

   🇩🇪Archaikum

   Synonyme: archaeanarchaeozoicarcheozoic