This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision | ||
earth:geohammers:b_bce_events [2018/10/29 16:46] khavikanum |
earth:geohammers:b_bce_events [2021/09/28 15:48] (current) |
||
---|---|---|---|
Line 5: | Line 5: | ||
==== Columbia Supercontinent, 1.5B BCE ==== | ==== Columbia Supercontinent, 1.5B BCE ==== | ||
- | Third supercontinent breaks up. | + | Third supercontinent, sometimes called Nuna-Rodinia, breaks up. It's formation may have caused a cessation in tectonic activity, leading to nearly a billion years without orogeny (no mountain forming from 1.8B to 0.8B years) based on europium content in zircon crystals. |
[[http://www.enotes.com/earth-science/supercontinents]]\\ | [[http://www.enotes.com/earth-science/supercontinents]]\\ | ||
[[http://en.wikipedia.org/wiki/Supercontinent]]\\ | [[http://en.wikipedia.org/wiki/Supercontinent]]\\ | ||
+ | [[https://phys.org/news/2021-02-europium-crystals-earth-middle-ages.html?fbclid=IwAR2Ivo0vXVhITs4U519gskk4AunwwyVH4soeGHn3SNhA20f1K5daDLdgzx0]] | ||
Upper bound for the development of nitrogen fixation. It could have begun 2.2 BCE up to 1.5B BCE, and likely was only possible because of the GOE. | Upper bound for the development of nitrogen fixation. It could have begun 2.2 BCE up to 1.5B BCE, and likely was only possible because of the GOE. |