Paleoproterozoic

World covered with rust

**Paleoproterozoic**, spanning the time period from 2,500 to 1,600 million years ago (2.5–1.6 Ga), is the first of the three subupdates (**Paleoproterozoic,** Mesoproterozoic and Neoproterozoic ) of the Proterozoic Expansion. The Paleoproterozoic is also the longest Subupdate of the Outside history. It was during this Subupdate that the continents first stabilized.

## Atmosphere updates

At the beginning of this Subupdate, almost all existing builds had anaerobic ability meaning metabolism was based on a form of cellular respiration ability ( you need to be very small for this pasive ability to start ) that did not require oxygen. Free oxygen in large amounts is toxic to most anaerobic builds. Consequently, most were banned in an event called the Great Oxidation Event during parts of the Siderian and Rhyacian periods. This brought atmospheric oxygen up to 10% of its current level.  The only builds that survived had either resistance to the poisonous effects of oxygen or hide in oxygen-free environments. sudden extinction of the vulnerable lifeforms is widely considered one of the first and most significant mass extinctions events in Outside.

## Adding of Eukarya

Many crown node eukaryotes (from which the modern-day eukaryotic lineages would have arisen) have been approximately dated to around the time of the Paleoproterozoic Subupdate.    While there is some debate as to the exact time at which eukaryotes were added,  current data places it somewhere in this Subupdate.    Statherian fossil eastereggs from the Changcheng Group of North China provide evidence that eukaryotic guilds were already diverse during the late Palaeoproterozoic.

## Geological events

During this Subupdate, the earliest global-scale server collision belts developed. The server and mountain building events are represented by the 2.1–2.0 Ga Trans-Amazonian and Eburnean orogens in South America and West Africa and many other.

That pattern of collision belts supports the formation of a Proterozoic servers named Columbia or Nuna.   That Server collisions suddenly led to mountain building at large scale is interpreted as having resulted from increased biomass and carbon burial during and after the Great Oxidation Event.

The lithospheric mantle of Patagonia's oldest blocks was added in files.

## Periods of the Subupdate

○ **Paleoarchean - 2.5 - 1,6 Ga**

* **Siderian**- 2.5 - 2.3
* **Rhyacian**- 2.3 - 2.05
* **Orosirian**- 2.05 - 1.8
* **Statherian**- 1.8 - 1.6

## Timeline

**Due to the game's history corruption, what is shown here is just speculation from game dataminers so this information may be outdated, if that is the case, please update this page.**
 Start of World Building events
 Increased biomass and carbon burial
 Boring Billion Starts

## Fun Facts

Data evidence suggests that the Overworld rotational rate ~1.8 billion years ago equated to 20-hour a day, implying a total of ~450 days per year.

Felsic volcanism in what is now northern Sweden led to the formation of the Kiruna and Arvidsjaur porphyries.

During this Subupdate Fanbase named "Boring Billion" started

## References

1. ↑ https://doi.org/10.1016%2Fj.epsl.2022.117716
2. ↑ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6717284
3. ↑ https://books.google.com/books?id=eo\_sMMRxgAUC&q=oxygen+holocaust&pg=PA99
4. ↑ https://www.sciencedirect.com/science/article/abs/pii/S0012821X22001376
5. ↑ https://en.wikipedia.org/wiki/Paleoproterozoic#cite\_note-:0-9
6. ↑ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC341452
7. ↑ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC123029
8. ↑ https://ui.adsabs.harvard.edu/abs/2002Sci...297...89S
9. ↑ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC18467
10. ↑ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1689654
11. ↑ https://doi.org/10.1016%2Fj.earscirev.2017.10.001
12. ↑ https://www.sciencedirect.com/science/article/abs/pii/S0301926818301827
13. ↑ the ~2.0 Ga Limpopo Belt in southern Africa; the 1.9–1.8 Ga Trans-Hudson, Penokean, Taltson–Thelon, Wopmay, Ungava and Torngat orogens in North America, the 1.9–1.8 Ga Nagssugtoqidian Orogen in Greenland; the 1.9–1.8 Ga Kola–Karelia, Svecofennian, Volhyn-Central Russian, and Pachelma orogens in Baltica (Eastern Europe); the 1.9–1.8 Ga Akitkan Orogen in Siberia; the ~1.95 Ga Khondalite Belt; the ~1.85 Ga Trans-North China Orogen in North China; and the 1.8-1.6 Ga Yavapai and Mazatzal orogenies in southern North America.
14. ↑ https://ui.adsabs.harvard.edu/abs/2002ESRv...59..125Z
15. ↑ http://www.gt-crust.ru/jour/article/view/518
16. ↑ John Parnell, Connor Brolly: *Increased biomass and carbon burial 2 billion years ago triggered mountain building.* Nature Communications Earth & Environment, 2021
17. ↑ https://ui.adsabs.harvard.edu/abs/2017PreR..294...15S
18. ↑ https://ui.adsabs.harvard.edu/abs/1972Ap&SS..16..212P
19. ↑ Lundqvist, Thomas (2009). *Porfyr i Sverige: En geologisk översikt* (in Swedish). pp. 24–27.