Hadean
| Hadean Eon 4600–4000 million years aby | |
-4500 — – -4000 — – -3500 — – -3000 — – -2500 — – -2000 — – -1500 — – -1000 — – -500 — – 0 — |
The Hadean is a geologic eon o the Yird pre-datin the Archean. It begoud wi the formation o the Yird aboot 4.6 billion year aby an endit, as defined bi the ICS, 4 billion year aby.[1] As o 2016[update], the ICS describes its status as "informal".[2]
References eedit
- ↑ "International Chronostratigraphic Chart 2015" (PDF). International Commission on Stratigraphy. Retrieved 23 Januar 2016.
- ↑ Ogg, J. G.; Ogg, G.; Gradstein, F. M. (2016). A Concise Geologic Time Scale: 2016. Elsevier. p. 20. ISBN 978-0-444-63771-0.