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1600 Mya – 2500 Mya: all GSSA points Eras in the Archean Eon 2500 Mya – years > 3600 Mya rocks older than 2.5 Billion years – rocks older than 3.6 Billion years [1] [2] Neoarchean: 2500 Mya – 2800 Mya (only GSSA points) Mesoarchean: 2800 Mya – 3200 Mya: Paleoarchean: 3200 Mya – 3600 Mya: Eoarchean: 3600 Mya – 4000 Mya: Earth's ...
In geology, a debate remains open concerning the use of Myr (duration) plus Mya (million years ago) versus using only the term Ma. [1] [2] In either case, the term Ma is used in geology literature conforming to ISO 31-1 (now ISO 80000-3) and NIST 811 recommended practices.
Name Elevation Location Last eruption meters feet Coordinates; Bora Bora: 727: 2385: 3.1 Mya Mangareva: 441: 1446: extinct Mehetia: 435: 1427 <31,000 years ago Moua Pihaa
1.95–0.13 Mya: Type site: ... from the French acheuléen after the type ... and in 2023 finds from Ethiopia were reported dating to 1.95 million years ago. [2] ...
2.1 Notes. 2.2 Literature. ... It spans the time between 86.3 ± 0.7 mya (million years ago) ... The Santonian Stage was established by French geologist Henri Coquand ...
The Jurassic (/ dʒ ʊ ˈ r æ s ɪ k / juurr-ASS-ik [2]) is a geologic period and stratigraphic system that spanned from the end of the Triassic Period 201.4 million years ago (Mya) to the beginning of the Cretaceous Period, approximately 143.1 Mya.
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Dryopithecus is a genus of extinct great apes from the middle–late Miocene boundary of Europe 12.5 to 11.1 million years ago (mya). Since its discovery in 1856, the genus has been subject to taxonomic turmoil, with numerous new species being described from single remains based on minute differences amongst each other, and the fragmentary nature of the holotype specimen makes differentiating ...