The Paleoarchean (/ˌpeɪlioʊ.ɑːrˈkiːən, ˌpæl-/ PAY-lee-oh-ar-KEE-ən, PAL-), also spelled Palaeoarchaean (formerly known as the early Archean), is a geologic...

million years, from the end of the Hadean Eon 4031 Mya to the start of the Paleoarchean Era 3600 Mya. Some estimates place the beginnings of life on Earth in...

eventually into the nitrogen- and carbon dioxide-rich, weakly reducing Paleoarchean atmosphere. The eon's name "Hadean" comes from Hades, the Greek god of...

Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean (3.2–3.6 Ga) Eoarchean (3.6–4 Ga) Hadean Eon (4–4.6 Ga)   ka = kiloannum...

(one of the earliest forms of life on Earth) have been dated to the Paleoarchean era approximately 3.5 billion years ago. Marble Bar has been described...

Kaapval craton begins: old tonaltic gneisses laid down c. 3,600 Ma – Paleoarchean Era starts. Possible assembly of the Vaalbara supercontinent; oldest...

ago, and the Eoarchean, starting 4 billion years ago, and part of the Paleoarchean era, starting 3.6 billion years ago, of the Archean eon. This period...

Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean (3.2–3.6 Ga) Eoarchean (3.6–4 Ga) Hadean Eon (4–4.6 Ga)   ka = kiloannum...

Precambrian Hadean (or hadaeozoic) Archean (or archaeozoic) Eoarchean Paleoarchean Mesoarchean Neoarchean Proterozoic Paleoproterozoic Siderian Rhyacian...

chronostratigraphic erathem. There are ten defined eras: the Eoarchean, Paleoarchean, Mesoarchean, Neoarchean, Paleoproterozoic, Mesoproterozoic, Neoproterozoic...

Archaea Temporal range: 3420–0 Ma Pha. Proterozoic Archean Had. Paleoarchean – present Scientific classification Domain: Archaea Woese, Kandler & Wheelis...

as well as the seafloor magnetic anomalies. Paleomagnetic studies of Paleoarchean lava in Australia and conglomerate in South Africa have concluded that...

Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean (3.2–3.6 Ga) Eoarchean (3.6–4 Ga) Hadean Eon (4–4.6 Ga)   ka = kiloannum...

Earth, estimated to have lived some 3.5 to 3.8 billion years ago (in the Paleoarchean). The project of a complete description of the phylogenetic relationships...

– 0 — Precambrian Hadean Archean Proterozoic Phaner ozoic Eoarchean Paleo­archean Meso­archean Neoarchean Paleo­proterozoic Meso­proterozoic Neo­proterozoic...

collection of paleontology amount to tens of thousands. They date from the Paleoarchean to the Eocene. The invertebrates room was named Saint-Simon in honor...

Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean (3.2–3.6 Ga) Eoarchean (3.6–4 Ga) Hadean Eon (4–4.6 Ga)   ka = kiloannum...

Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean (3.2–3.6 Ga) Eoarchean (3.6–4 Ga) Hadean Eon (4–4.6 Ga)   ka = kiloannum...

Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean (3.2–3.6 Ga) Eoarchean (3.6–4 Ga) Hadean Eon (4–4.6 Ga)   ka = kiloannum...

Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean (3.2–3.6 Ga) Eoarchean (3.6–4 Ga) Hadean Eon (4–4.6 Ga)   ka = kiloannum...

Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean (3.2–3.6 Ga) Eoarchean (3.6–4 Ga) Hadean Eon (4–4.6 Ga)   ka = kiloannum...

Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean (3.2–3.6 Ga) Eoarchean (3.6–4 Ga) Hadean Eon (4–4.6 Ga)   ka = kiloannum...

– 0 — Precambrian Hadean Archean Proterozoic Phaner ozoic Eoarchean Paleo­archean Meso­archean Neoarchean Paleo­proterozoic Meso­proterozoic Neo­proterozoic...

Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean (3.2–3.6 Ga) Eoarchean (3.6–4 Ga) Hadean Eon (4–4.6 Ga)   ka = kiloannum...

Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean (3.2–3.6 Ga) Eoarchean (3.6–4 Ga) Hadean Eon (4–4.6 Ga)   ka = kiloannum...

Archean Eon (2.5–4 Ga) Neoarchean (2.5–2.8 Ga) Mesoarchean (2.8–3.2 Ga) Paleoarchean (3.2–3.6 Ga) Eoarchean (3.6–4 Ga) Hadean Eon (4–4.6 Ga)   ka = kiloannum...

and eonothem are divided similarly into the Neoarchean, Mesoarchean, Paleoarchean and the Eoarchean, for which a lower (oldest) limit is undefined. Body...

Abag Formation A’ershan Formation A’ertashi Formation A’ergong Formation Dabeigou Formation Jianxing Formation Jiufotang Formation Tuchengzi Formation...

earliest form of photosynthesis that evolved on Earth, as far back as the Paleoarchean, preceding that of cyanobacteria (see Purple Earth hypothesis). While...

estimates of the LUCA's age ranged from 3.5 to 3.8 billion years ago in the Paleoarchean, a few hundred million years before the earliest fossil evidence of life...