'''Ìgbà iwájú Kámbríà''' (Pre-Cambrian) ni oruko afisise fun ibu asiko siwaju Iggbarun ''[[Phanerozoic|Igbeyosaye]]'' Eon isinyi, be sini o je Igbarungbangba to pin si and is a Supereon divided into several [[eon (geology)|eonsigbarun]] oforisirisi thelori [[geologic time scale|osuwon asiko iseorooriile]]. O Itbu spanslati from the formation ofidarajo [[Earth|aye]] aroundni bi 4600 [[annum|Ma]] (millionegbegberun yearsodun agoseyin) tode theibere beginning of the [[Cambrian|Ìgbà Kámbríà]] Period, aboutnibi 542 Ma, whennigbati awon macroscopiceranko hardonigba-shelledeyin animalslilo firstkoko appearedpo in abundancejantirere.O nje TheÌgbà Precambrianiwájú isKámbríà sonitoripe namedo becausesiwaju itIgba precedes the CambrianKambria, the first [[geologic period|periodigba]] ofakoko theIgbarun Phanerozoic EonIgbeyosaye, whichti isoruko namedre afterwa thelati inu classicaloruko nameologbologbo forfun [[Wales]], ''[[Cambria]]'', wherenibi rocksti fromawon thisapata agelati wereigba firstyi ti koko je studiedsisekiko. The Precambrian accounts for 88% of geologic time.
