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.

Jan 16, 2014 · 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.

Eoarchean geology is the study of the oldest preserved crustal fragments of Earth during the Eoarchean era from 4.031 to 3.6 billion years ago.

Apr 4, 2025 · Archean Eon, the earlier of the two formal divisions of Precambrian time (about 4.6 billion to 541 million years ago) and the period when life first formed on Earth.

Eoarchean [3.6 to 4.0 billion years ago (Ga)] tonalite-trondhjemite-granodiorite (TTG) is the major component of Earth’s oldest remnant continental crust, thereby holding the key to understanding how continental crust originated and when plate tectonics started in the early Earth.

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 …

Dec 1, 2021 · The Eoarchean Itsaq Gneiss Complex of Greenland and the Paleoarchean Eastern Pilbara Craton of Western Australia feature very strongly in the literature as exemplars for understanding early geodynamics.

Simple single-celled life (probably bacteria and archaea). Oldest probable microfossils. The first life forms and self-replicating RNA molecules evolve around 4000 Ma, after the Late Heavy Bombardment ends on Earth. Napier Orogeny in Antarctica, 4000 ± 200 Ma.

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

Sep 21, 2023 · Welcome to a journey back in time, where we explore the remarkable epoch known as the Archean Eon. This era, which spans roughly from 4 billion to 2.5 billion years ago, represents Earth’s formative years—a time of tumultuous geological changes, the emergence of life, and intriguing mysteries.