precambrian

• Präkambrium ist die erdgeschichtliche Ära vor dem Kambrium, die von der Entstehung der Erde vor etwa 4,6 Milliarden Jahren bis zum Beginn des Kambriums vor etwa 541 Millionen Jahren reicht und die Hadaikum, Archaikum und Proterozoikum umfasst.

A proper noun referring to the geological eon that spans from the formation of the Earth around 4.6 billion years ago to the beginning of the Cambrian Period, about 541 million years ago, encompassing the Hadean, Archean, and Proterozoic eons.

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1. Geological eonC2formalscientific

   The eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago.

   Geologisches Äon

   • The Precambrian covers roughly 88% of Earth's history.
   • Fossils from the Precambrian are extremely rare.
   • The atmosphere during the Precambrian was very different from today.