Mesoarchean

3,200 to 2,800 million years ago

The Mesoarchean (/ˌmiːzoʊɑːrˈkiːən/, also spelled Mesoarchaean) is a geologic era within the Archean Eon, spanning 3,200 to 2,800 million years ago. The era is defined chronometrically and is not referenced to a specific level in a rock section on Earth. Fossils from Australia show that stromatolites have lived on Earth since the Mesoarchean. The Pongola glaciation occurred around 2,900 million years ago. The first supercontinent Vaalbara broke up during this era about 2,800 million years ago.

The earliest reefs date from this era, and were probably formed by stromatolites. The surface temperature during the Mesoarchean was likely not much higher than modern-day temperatures. Atmospheric carbon dioxide concentration was only a few times higher than its pre-industrial value, and the Sun's luminosity was only 70% of its current value, cancelling out the influence of a greater degree of greenhouse effect that may be operating.


 * The last remnants of the Vaalbaraians are expunged by time.
 * The Dragons rise on their planet from a Dragonite (Vaalbarian seed)
 * The first sentient Shiss appears on Shistaa
 * The Klack organize their first nest wars
 * The Seeders and the Earlies are now extinct themselves.
 * The Traveller leaves the Orlan society.
 * The Orlans reach TL 11 and begin the construction of the Ancient Gate Network.
 * The Exalted takes seat on the World of Old
 * The Nul fight their first Nuclear war
 * The Wurgus reach TL 3 and ascent