PaleoProterozoic Earth

THE PROTEROZOIC EON (PaleoProterozoic Era)
2.5 to 1.6 Billion Years Ago

The Long Age of Planetary Maturation
The Earth 'comes of age' - the oxygen atmosphere forms.
Then God said, ". . . I give every green plant for food." - Genesis 1:29-30

Select an Eon


  • Continents stabilize; begin to consolidate
  • Oxygen atmosphere forms
  • Metals 'rust' out of the oceans; oceans turn blue.
  • 'Banded Iron' rock formations created as free oxygen
    oxidizes the metal on the surface and in oceans.
  • All land is barren, lifeless desert


Cyanobacterial stromatollites in the Early Proterozoic
(Source: K.M. Towe, NASA)

  Green cyanobacteria
  took almost a blllion   years to create our   oxygen atmosphere.

  (Source: M. Clayton,
 Univ. WI, Madison)



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