| Eoarchean era | | Geologic timescale of the Precambrian | | (millions of years ago) | |  (expand) The geologic timescale is used by geologists and other scientists to describe the timing and relationships between events that have occured during the history of the Earth. ...
The Precambrian or Cryptozoic is the period of the geologic timescale from the formation of Earth around 4500 million years before the present (BP) to the evolution of abundant macroscopic hard-shelled fossils, which marked the beginning of the Cambrian, some 542 million years BP. Remarkably little is known about...
| In the geologic timescale, the Eoarchean or EA was an era that lasted from about 3800 MYA to 3600 MYA. It is the first part of the Archaean eon and the first part of the Precambrian eon. During this era, prokaryotes (simple single-celled life) are thought to have originated. The Hadean eon was prior to the Eoarchean, from around 4560 MYA to 3900 MYA. In chronostratigraphy, its zone rank is an erathem. The geologic timescale is used by geologists and other scientists to describe the timing and relationships between events that have occured during the history of the Earth. ...
ERA is an abbreviation for several different things, including: the Equal Rights Amendment, a proposed, but unratified, Constitutional amendment in United States Earned run average, a baseball statistic Engine Room Artificer Education Reform Act Engineering Research Associates, a pioneering computer firm from the 1950s Academy of European Law Trier Explosive...
Mya has more than one meaning: Mya, an American R&B singer. ...
The Archean is a geologic eon; it is a somewhat antiquated term for the time span between 2500 million years before the present and 3800 million years before the present. ...
There are several uses of the word eon. ...
The Precambrian or Cryptozoic is the period of the geologic timescale from the formation of Earth around 4500 million years before the present (BP) to the evolution of abundant macroscopic hard-shelled fossils, which marked the beginning of the Cambrian, some 542 million years BP. Remarkably little is known about...
Prokaryotes (from Old Greek pro- before + karyon nut, referring to the cell nucleus, + suffix -otos, pl. ...
The name Hadean refers to a geologic period: the time prior to 3,800,000,000 years before the present -- 3,800MA. The geologist Preston Cloud coined the now somewhat outdated term in 1972, originally to label the period before the earliest known rocks. ...
The Eoarchean was followed by the Paleoarchean era. The Paleoarchean is a geologic era within the Archaean. ...
The name comes from two Greek words: eon (dawn) and archios (ancient).
The Archean is a geologic eon; it is a somewhat antiquated term for the time span between 2500 million years before the present and 3800 million years before the present. ...
The Paleoarchean is a geologic era within the Archaean. ...
The Mesoarchean is a geologic era within the Archean, spanning 3. ...
The Neoarchean is a geologic era within the Archaean. ...
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