DescriptionGeobiology timeline with rise of O2.png
English: The geologic timescale overlain with major geobioligic events and occurrences. The oxygenation of the atmosphere is shown in blue starting about 2.4 Ga, although the exact dating of the GOE is debated.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.