Editing Timeline of glaciation (section)

== Known ice ages ==
[[File:GlaciationsinEarthExistancelicenced annotated.jpg|900px|Major known ice ages shown in blue.]]
{| class="wikitable"
! Name of ice age
! Years BP ([[Year#SI prefix multipliers|Ma]])
! Geological period
! Era
|-
| [[Pongola glaciation|Pongola]]
| 2900–2780<ref name="Kopp">{{cite journal |author1=Robert E. Kopp |author2=Joseph L. Kirschvink |author3=Isaac A. Hilburn |author4=Cody Z. Nash  |name-list-style=amp | title=The Paleoproterozoic snowball Earth: A climate disaster triggered by the evolution of oxygenic photosynthesis | journal=Proc. Natl. Acad. Sci. U.S.A. | year=2005 | volume=102 | issue=32 | pages=11131–6 | doi=10.1073/pnas.0504878102 | pmid=16061801 | pmc=1183582|bibcode = 2005PNAS..10211131K |doi-access=free }}</ref>
|
| [[Mesoarchean]]
|-
| [[Huronian glaciation|Huronian]]
| 2400–2100
| [[Siderian]]<br/>[[Rhyacian]]
| [[Paleoproterozoic]]
|-
| [[Sturtian glaciation|Sturtian]]<br/>[[Marinoan glaciation|Marinoan]]<br/>[[Gaskiers glaciation|Gaskiers]]<br/>[[Baykonurian glaciation|Baykonur]]
| 715–680<br/>650–635<br/>580<br/>547
| [[Cryogenian]]<br/><br/>[[Ediacaran]]
| [[Neoproterozoic]]
|-
| [[Andean-Saharan glaciation|Andean-Saharan]]<br/>(incl. [[Hirnantian]] and<br/>[[Late Ordovician glaciation]])
| 450–420
| Late [[Ordovician]]<br/>[[Silurian]]
| [[Paleozoic]]
|-
| [[Karoo Ice Age|Karoo]]
| 360–289
| [[Carboniferous]]<br/>[[Permian]]
| [[Paleozoic]]
|-
| [[Late Cenozoic Ice Age]]<br/> (incl. [[Quaternary glaciation]])
| 34–present
| Late [[Paleogene]]<br/>[[Neogene]]<br/>[[Quaternary]]
| [[Cenozoic]]
|}