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Bookmark or Share- Proterozoic Eon: Eukaryotes to Multicellular Life (2500 to 541 million ...In the Proterozoic Eon, key highlights are: ozone layer thickened, an oxygen crisis, Snowball Earth and eukaryotes and multicellular organisms evolved.
- Proterozoic - WikipediaThe Proterozoic (IPA: / ˌ p r oʊ t ər ə ˈ z oʊ ɪ k, ˌ p r ɒ t-,-ər oʊ-,-t r ə-,-t r oʊ-/ PROH-tər-ə-ZOH-ik, PROT-, -ər-oh-, -trə-, -troh-) [3] [4] [5] is the third of the four geologic eons of Earth's history, spanning the time interval from 2500 to 538.8 Mya, [6] and is the longest eon of Earth's geologic time scale.
- Proterozoic Eon | Oxygen Crisis, Animals, & Facts | BritannicaProterozoic 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.
- 8.5: Proterozoic Eon - Geosciences LibreTextsThe Proterozoic Eon, meaning “earlier life,” is the eon of time after the Archean eon and ranges from 2.5 billion years old to 541 million years old. During this time, most of the central parts of the continents had formed and the plate tectonic process had started.
- 10.3: The Proterozoic Eon (2500-541 Ma) - Geosciences LibreTextsThe Proterozoic Eon, meaning “earlier life,” comes after the Archean Eon and ranges from 2.5 billion to 541 million years old. During this time, most of the central parts of the continents had formed, and plate tectonic processes had started.
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