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The Proterozoic Aeon. 2.5 Billion to 541 Million Years Ago. Ryan Somma. An artists representation of life in the Ediacaran seas during the last period of the Proterozoic aeon, including the mysterious Dickinsonia and primitive jellyfish.
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.
24 sie 2024 · 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.
In the Proterozoic Eon, there is evidence that eukaryotes and multicellular organisms appeared on Earth. The Great Oxygenation Event occurred when cyanobacteria living in the oceans started producing oxygen through photosynthesis.
21 sie 2024 · 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.
Ediacaran Community, Proterozoic Eon (2,500 - 542 Million Years Ago) Earth’s first animals had soft bodies. This illustration shows a community of soft-bodied Ediacaran (edi-A-karan) animals. Some species resemble living ocean creatures.
21 sie 2024 · Examples of key Proterozoic fossils that represent probable eukaryotes. (a) Tappania plana, a total group eukaryote from the Greyson Formation, Belt Supergroup, Montana, USA, image courtesy Adam . (b) Proterocladus antiquus, a total group green alga from the Nanfen Formation, Xihe Group, North China, image courtesy Tang .
