Life during the Proterozoic began to evolve from simple single cell organisms into more advanced single cell organisms. Eukaryotes, single cell organisms with a nucleus and membrane, evolved from the more simple cyanobacteria.
Proterozoic Eon: Timeline & Facts 1 Timeline of the Proterozoic Eon. The Proterozoic eon lasted almost two billion years, starting 2,500 million years ago and ending 542 million years ago. 2 Snowball Earth. ... 3 Evolution of Life. ... 4 Oxygen in the Atmosphere. ... 5 Plate Tectonics. ...
Plate tectonics were active during the Proterozoic, just as it is now. Between 1,000 - 830 million years ago, plate tectonics pushed the continental masses together to form a supercontinent named Rodinia. Little information is known about Rodinia, but paleomagnetism evidence suggests it to have been positioned in the southern hemisphere.
Why are older rocks from the Archean and Proterozoic harder to determine an age and history? Plate tectonics destroyed most older rocks Little or no fossils to use as age indication
Life during the Proterozoic began to evolve from simple single cell organisms into more advanced single cell organisms. Eukaryotes, single cell organisms with a nucleus and membrane, evolved from the more simple cyanobacteria. Evolution began to diversify the types of organisms found in the ocean around this time. This increase in abundance of life led to a major change in the atmosphere.
Although new research and fossil finds can change when the first animal fossils came into existence, the end of the Proterozoic currently is set at 542 million years ago. Lesson Summary.
The Proterozoic eon lasted almost two billion years , starting 2,500 million years ago and ending 542 million years ago. During the timeline of the eon, several different events took place, eventually helping to shape the earth as we know it today.
This increase in life over time - such as eukaryotes (single cell organisms with a nucleus and membrane) and the more simple single cell organisms of the time, cyanobacteria - led to an increase in the abundance of oxygen in the atmosphere.
Plate tectonics were active during the Proterozoic, just as it is now. Between 1,000 - 830 million years ago , plate tectonics pushed the continental masses together to form a supercontinent named Rodinia.
The eon came to an end at 542 million years ago and gave way for the Cambrian eon, in which Earth finally started to see the development of more complex life. To unlock this lesson you must be a Study.com Member. Create your account.