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Part 13: Paleogene Earth – The Rise of Mammals. Part 14: Neogene Earth – Human Ancestors. Part 15: Quaternary Earth – The Age of Man. Spanning almost 2-billion years, the Proterozoic era saw the evolution of a world we could almost recognise today.
20 lip 2024 · Kids Encyclopedia Facts. Lower Proterozoic Stromatolites from Bolivia, South America (polished vertical section through rock) The Proterozoic eon comes before the Phanerozoic. It was a period before the first abundant complex life on Earth. The name Proterozoic comes from the Greek "earlier life".
Proterozoic Eon, the younger of the two divisions of Precambrian time, extending from 2.5 billion to 541 million years ago. During the Proterozoic, the atmosphere and oceans changed significantly. Its rocks contain the fossil remains of bacteria and blue-green algae as well as the first oxygen-dependent animals.
This animated video discusses the the Proterozoic era. The proterozoic era is a geological eon representing a period before the first abundant complex life on Earth
In the Proterozoic Eon, key highlights are: ozone layer thickened, an oxygen crisis, Snowball Earth and eukaryotes and multicellular organisms evolved.
Classically, the boundary between the Proterozoic and the Phanerozoic eons was set at the base of the Cambrian Period when the first fossils of animals, including trilobites and archeocyathids, as well as the animal-like Caveasphaera, appeared.
It was a period before the first abundant complex life on Earth. The name Proterozoic comes from the Greek "earlier life". The Proterozoic Eon extended from 2500 million years ago (mya) to 541 mya. It is the most recent part of the former Precambrian.
