▁for ▁ 1 – 0 . 4   G a ▁and ▁hence ▁had ▁a ▁life ▁span ▁similar ▁to ▁that ▁of ▁later ▁super cont in ents ▁such ▁as ▁G ond w ana ▁and ▁Rod in ia . ▁Some ▁p ala e om agnet ic ▁reconst ru ctions ▁suggest ▁a ▁Pala e o arch ae an ▁Pro to - V aal bara ▁is ▁possible , ▁although ▁the ▁existence ▁of ▁this ▁ 3 . 6 – 3 . 2   G a ▁continent ▁can ' t ▁be ▁une qu iv oc ally ▁proven . ▁ ▁Ev idence ▁for ▁Va al bara ▁South ▁Africa ' s ▁Ka ap va al ▁cr aton ▁and ▁Western ▁Australia ' s ▁Pil bara ▁cr aton ▁have ▁similar ▁early ▁P rec amb rian ▁cover ▁sequences . ▁Ka ap va al ' s ▁Bar ber ton ▁gran ite - green stone ▁ter rane ▁and ▁Pil bara ' s ▁eastern ▁block ▁show ▁evidence ▁of ▁four ▁large ▁meteor ite ▁impact s ▁between ▁ 3 . 2 ▁and ▁ 3 . 5 ▁billion ▁years ▁ago . ▁( Sim ilar ▁green stone ▁bel ts ▁are ▁now ▁found ▁at ▁the ▁marg ins ▁of ▁the ▁Super ior ▁cr aton ▁of ▁Canada .) ▁ ▁The ▁high ▁temper atures ▁created ▁by ▁the ▁impact ' s ▁force ▁f used ▁sed iments ▁into ▁small ▁glass y ▁spher ules . ▁S pher ules ▁of ▁ 3 . 5 ▁billion ▁years ▁old ▁exist ▁in ▁South ▁Africa ▁and ▁spher ules ▁of ▁a ▁similar ▁age ▁have ▁been ▁found ▁in ▁Western ▁Australia , ▁they ▁are ▁the ▁oldest -