Cryogenian Earth

THE PROTEROZOIC EON (Cryogenian Period)
850 to 635 Million Years Ago

The Age of "Snowball Earth"
The Sturtian and Marinoan Global Ice Ages
He hurls down his hail like pebbles. Who can withstand His icy blast? - Psalms 147:17



   Eukaryotic red algae
) and green algae
  (right). They flourished   before the Cryogenian
  and survived after.

     UCMP Berkeley left
   UCLA Astrobiology right)
The frozen landscape of Snowball Earth
(Source: NASA/Wallops)


To the Hadean Eon To the Archean Eon To the PaleoProterozoic Era To the Cryogenian Period To the Ediacaran Period To the Phanerozoic Eon To Earth History Timeline To the Ediacaran Period To the MesoProterozoic Era