Sturtian glaciation

The Sturtian glaciation was a worldwide glaciation during the Cryogenian Period when the Earth experienced repeated large-scale glaciations. As of January 2023, the Sturtian glaciation is thought to have lasted from c. 717 Ma to c. 660 Ma, a time span of approximately 57 million years. It is hypothesised to have been a Snowball Earth event, or contrastingly multiple regional glaciations, and is the longest and most severe known glacial event preserved in the geologic record, after the much earlier Huronian glaciation.

Events of the Cryogenian Period

−720 —

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−710 —

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−700 —

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−690 —

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−680 —

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−670 —

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−660 —

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−650 —

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−640 —

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−630 —

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Tonian

Cryogenian

Ediacaran

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Marinoan glaciation

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Transition from cyanobacterial to algal dominated world.

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Sturtian

Major Glacial period

Events of the Cryogenian period
Axis Scale: Millions of Years Ago (Ma).

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