Categories » Archean Eon

Mesoarchean Era
The absolute date of the Mesoarchean Era occurred around 2,800-3,200 million years ago. The geology of this time period included vast amounts of water.  As oxygen continued to be used up in oxidizing minerals on the earths crust and sea oxygen levels (More)
The Beginning Of Time
The Eoarchaen Era is a mysterious time period in the beginning of Earth that still stumps scientists. It comes after the Hadean era which is the first geologic time recorded. During to time period that happened 4-3.6 billion years ago, the earts crus (More)
Paleoarchean Era
The Paleoarchean Era lasted from 3.6 bya to 3.2 bya. This time period does not have a specific rock layer assigned to it. There was evidence of non-oxygen prod (More)
Archean Eon
The Archean Eon started around 3850 m.y.a. and ended around 2500 m.y.a. Time scale of the (More)
Mesoarchean Era
Absolute date: 2,800- 3,200MYA Special Event: first direct evidence of life on Earth: Anaeorbic Prokaryotes. Animal: stromatolites- longest living organism on Earth. They are sediment trapping, binding, and precipitating of phototrophic microbe (More)
Neoarchean Era
Time: 2800-2500 b.y.a Geology/ tectonics: One of the earliest supercontinents, Kenoeland, formed 2.7 bya as a result of a series if accretion events and the formation of new continental crust (Halla 2005). More info about kenoeland click the li (More)
First Signs of Life
The Paleoarchean era lasted from 3600-3200 million years ago. The supercontinent Vaalbara formed as early as 3600 million years ago, and was a complete supercontinent by 3100 million years ago. It consisted of these two regions of Africa and Weste (More)
Eoarchean Era
Eoarchean era (3850-3720) myo This is when the Earth had a solid crust for the first time, lava may (More)
The Paleoarchean Era
The Paleoarchean Era is 3600-3200 million years old. It spans a time when the first supercontinent, Vaalbara, was in formation. The Earth was mostly ocean during this time and was covered in volcanoes that later formed islands which made Vaalbara.More)
Neoarchean Era
The Neoarchean Era began 2800 m.y.a And ended 2500 m.y.a Geological features: This era is credited with the formation of the supercontinent called Kenorland. (More)

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