The Eoarchean (IPA: / ˌiːoʊ.ɑːrˈkiːən / EE-oh-ar-KEE-ən; also spelled Eoarchaean) is the first era of the Archean Eon of the geologic record. It spans 431 million years, from the end of the Hadean Eon 4031 Mya to the start of the Paleoarchean Era 3600 Mya.

始太古代（Eoarchean），是太古宙第一个代，也是地球形成固态地壳后首先有地质记录的年代。 它自40亿年前 冥古宙 结束后持续了4亿年，到36亿年前结束。

太古代，是地质发展史中最古老的 时期，该时期所形成的地层称为太古界。 该时期延续时间长达15亿年，是地球 演化 史中具有明确地质记录的最初阶段。 由于年代久远，太古代的保存下来的地质纪录非常破碎、零散。 但是，太古代又是地球演化的关键时期，地球的 岩石圈 、 水圈 、 大气圈 和 生命 的形成都发生在这一重要而又漫长的时期，大约39亿年前，地球形成最初的永久地壳，至35亿年前大气圈、海水开始形成。 太古代（Archeozoic）最古的地质时代。 一般指距 …

The Eoarchean era. As far as official geology and stratigraphy goes, the Eoarchean is still shrouded in mystery. The term Eoarchean Era is used by the International Commission on Stratigraphy in 2000 for everything prior to

Archaean Landscape; image from Space Biology - source, NASA. The Archean (or Archaean; formerly Archeozoic or Archaeozoic) was a long and, due to its great distance in time, poorly known geologic eon that last a whopping 1.3 gigayears (or 13 geons). That's almost two and half times the entire history of complex life on Earth.

2014年1月16日 · The Eoarchean is the first phase of our planet from which solid rock formations survived. The largest is the Isua Greenstone Belt at the south-west coast of Greenland. It appeared during the Eoarchean around 3.8 billion years ago.

2023年9月21日 · Eoarchean hydrothermal vent environments provided stable, anaerobic, and hot habitats in which hyperthermophilic life could have emerged and become established. These hydrothermal fields were geochemically reactive in the far-from-equilibrium setting and contained an assortment of cosmic and terrestrial organic compounds.

Archean rocks are found in Greenland, Siberia, the Canadian Shield, Montana, Wyoming (exposed parts of the Wyoming Craton), Minnesota (Minnesota River Valley), the Baltic Shield, the Rhodope Massif, Scotland, India, Brazil, western Australia, and …

The Eoarchaean (Eoarchean) is the first geological era in the Archaean eon that began 4 billion years ago, and ended 3.6 billion years ago. [1] Before it was the Hadean It is followed by the Palaeoarchaean. The Eoarchaean is the earliest period of …

2025年1月16日 · Recently subdivided into the Eoarchean (4.031 - 3.60 Ga), Paleoarchean (3.60 - 3.20 Ga), Mesoarchean (3.20 - 2.80 Ga), and Neoarchean (2.80 - 2.50 Ga). These boundaries are arbitrarily defined, and do not correspond with particular correlative phenomena (although the upper boundary of the Neoarchean is close to the origin of modern plate ...