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- Proterozoic - Wikipedia
The 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
- 元古代 - 百度百科
元古代（Proterozoic Era，Proterozoic）紧接在太古代之后的一个地质年代。 这一时期形成的地层叫元古界，代表符号为“Pt”。 元古代一词的英文“Proterozoic"指的是”早期的生命“。
- Proterozoic Eon | Oxygen Crisis, Animals, Facts | Britannica
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
- Proterozoic Eon—2. 5 Billion to 541 MYA - U. S. National Park Service
The Proterozoic Eon is the most recent division of the Precambrian It is also the longest geologic eon, beginning 2 5 billion years ago and ending 541 million years ago It accounts for a little less than 4 9ths of geologic time
- The Proterozoic Eon - University of California Museum of Paleontology
The period of Earth's history that began 2 5 billion years ago and ended 542 0 million years ago is known as the Proterozoic, which is subdivided into three eras: the Paleoproterozoic (2 5 to 1 6 billion years ago), Mesoproterozoic (1 6 to 1 billion years ago), and Neoproterozoic (1 billion to 542 0 million years ago) *
- 8. 5: Proterozoic Eon - Geosciences LibreTexts
The 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
- What is Proterozoic? - Earth. com
It is the most recent eon within the Precambrian period, which includes the Hadean, the Archean, and the Proterozoic eons The Proterozoic is itself also divided into three sub-geologic eras (from oldest to youngest): the Paleoproterozoic; Mesoproterozoic; Neoproterozoic; The Proterozoic Eon is known for hosting the transition to an oxygenated
- 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
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