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] …
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.
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“。
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.
10.3: The Proterozoic Eon (2500-541 Ma) - Geosciences LibreTexts
2024年8月24日 · The 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.
8.3: Proterozoic Eon - Geosciences LibreTexts
2024年9月22日 · 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.
Proterozoic (2500–541 Ma) - ScienceDirect
2023年1月1日 · The Proterozoic eon spans 2500–541 Ma and thus covers over 40% of Earth's history. It saw major Earth system events ( Stanley and Luczaj, 2014 ), such as the oxygenation of the atmosphere between 2400 and 2000 Ma, which in turn kickstarted the evolution of complex life ( El Albani et al., 2010 ; Stanley and Luczaj, 2014 ).
Proterozoic - New World Encyclopedia
During the Proterozoic eon, eukaryotes (cells with a distinct nucleus) first appear in the fossil record about 1.7 billion years ago. Over the next billion years the eukaryotes greatly diversified until by the later Proterozoic there were abundant soft-bodied, multicellular organisms —although, being soft-bodied, they were only rarely ...
Proterozoic Climates - SpringerLink
Most Proterozoic sedimentary rocks lack evidence of glaciation, suggesting that the typical world temperatures were moderate. Near the beginning and end of the Proterozoic, however, there is abundant evidence of multiple widespread glaciations.
Proterozoic (Aeon) - SpringerLink
The Proterozoic is the uppermost of the two great divisions of the Precambrian (2,500–542 Ma). Overview The Proterozoic Eon begins at 2.5 Ga, which approximately marks the time when oxygen from cyanobacteria began to dramatically change the composition of the Earth’s atmosphere and oceans, and when complex one-celled life (eukaryotes ...