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The Archaean eon was a geological eon spanning from around 3800 to 2500 million years ago, comprising the Eoarchean, Paleoarchean, Mesoarchean and Neoarchean eras - a period in which the first continents and oceans sprang up.
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When did the first living organism appear?
During the Archaean Eon
What domain do fossils of 3.5 billion years ago belong in?
They are fossils cyanobacteria from the Archaean eon.
What is the longest Eon in the Geologic Timescale?
The oldest eon of geologic time is the Archaean Eon of the Precambrian period. The oldest rocks and fossils date from this time, about 3.8 to 2.5 billion years ago. (Prior to that, the Hadean Eon began with the formation of the Earth. No geologic record exists from the Hadean, during which the Earth cooled from its molten state.)
What is the longest division of geologic time?
The oldest division of geologic time is the Precambrian, specifically the Archaean Eon from which the oldest rocks and fossils date. (The Hadean Eon preceded the Archaean, but no geologic records date from this time because the Earth was cooling from a molten state.)
What is the first part of earth's geologic history called?
From the origin of the earth until the first eukaryotic cells appeared (4.6 billion year ago until 2.5 billion years ago) was called the Archaean Eon.
What eon is after the Hadean Eon?
archean eon
What is after eon?
I don't know the plural of eon but the answer is more than 1 eon
What eon are you in?
I am currently in the Phanerozoic Eon.
What eon has no rock record?
the Hadean eon
What eon did the first plants appear?
Paleozoic eon
What eon was the Jurassic time period in?
It was in the Phanerozoic Eon.
How is the phanerozoic eon divided?
how was the phanerozoic eon divided.
