Precambrian period

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Noun

Precambrian period - the eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago

Precambrian, Precambrian aeon, Precambrian eon

Proterozoic, Proterozoic aeon, Proterozoic eon - from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms

Archaeozoic, Archaeozoic aeon, Archean, Archean aeon, Archean eon, Archeozoic, Archeozoic eon - the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life

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Archaeozoic Archaeozoic aeon Archean Archean aeon Archean eon Archeozoic Archeozoic eon Precambrian Precambrian aeon Precambrian eon Proterozoic Proterozoic aeon Proterozoic eon			They have puzzled over the dramatic increase in oxygen levels on the planet in the Precambrian period, between one billion and 540 million years ago. Clay key to Bible's Adam by Daily Record (Glasgow, Scotland) Finally, as a microbe in the Precambrian period, he learns that to kill and devour others is good--it's called heterotrophic life. Boffa, Alessandro. You're an animal by Julian, Janet / Kliatt Knoll of Harvard University says that Brasier and his colleagues, who report their discovery in the April Geology, have clearly documented the existence of sponges in the latest stage of the Precambrian period. The oldest sponges: a scratchy way of life by Monastersky, Richard / Science News			Prease preassault operation preassemble Preassurance Preataxic preatomic Preaudience preaxial prebend Prebendal prebendary Prebendaryship Prebendate Prebendship prebiological prebiotic preboard Prebronchial prebuilt prebuttal Precalculate precalculus Precambrian Precambrian aeon Precambrian eon Precambrian period precancel precancer precancerous Precant precarious precariously Precariousness precast precast concrete Precation Precative precatory Precatory words precaution Precautional precautionary precautionary launch precautionary search and rescue and/or combat search and rescue Precautious precava Precedaneous precede precedence precedency precedent			prebook method prebook method Preboot Execution Environment preboring preboring prebreaker Prebronchial prebuilt prebuttal prebuttals PREC precaching Precal Precalc Precalculate precalculus Precalculus and Discrete Math Precambrain Precambrain Precambrian Precambrian Precambrian Precambrian aeon Precambrian Crystalline Rocks Precambrian eon Precambrian era Precambrian era Precambrian era Precambrian Eras of Folding Precambrian Geology and Geochronology, Institute of IGGD Precambrian period Precambrian Shield Precambrian Shield Precambrian Shield Precambrian Time Precambrian Time Precambrian, Paleozoic, Mesozoic, Cenozoic precancel Precancel Stamp Society Precancel Stamp Society of Great Britain precanceled precanceling precancellation precancelled precancelling precancels precancer precancer precancer precancerous precancerous precancerous Precancerous cells Precancerous cells Precancerous cells precancerous changes of cervix precancerous dermatitis precancerous dermatosis precancerous dermatosis precancerous dermatosis precancerous lesion

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