Prot·er·o·zo·ic
Prot·er·o·zo·ic/ˌprōdərōˈzōik/
adjective
relating to or denoting the eon that constitutes the later part of the Precambrian, between the Archean eon and the Cambrian period, in which the earliest forms of life evolved.
"Proterozoic rocks occur in all the great Precambrian cratons of the world"
noun
the eon that constitutes the later part of the Precambrian, between the Archean eon and the Cambrian period, or the system of rocks deposited during it.
"we know very little of the geography of the Proterozoic"
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The Proterozoic is the third of the four geologic eons of Earth's history, spanning the time interval from 2500 to 538.8 Mya, the longest eon of the Earth's ...
Proterozoic
Geologic time scale
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The Proterozoic is the third of the four geologic eons of Earth's history, spanning the time interval from 2500 to 538.8 Mya, the longest eon of the Earth's geologic time scale. It is preceded by the Archean and followed by the Phanerozoic, and is... Wikipedia
Proterozoic Eon, the younger of the two divisions of Precambrian time, the older being the Archean Eon. The Proterozoic Eon extended from 2.5 billion to 541 ...
of, relating to, or being the eon of geologic time or the corresponding segment of rocks that includes the interval between the Archean and Phanerozoic eons ...
The period of Earth's history that began 2.5 billion years ago and ended 543 million years ago is known as the Proterozoic. Many of the most exciting events ...
The late. Proterozoic, in contrast, was characterized by extreme biogeochemical and climatic volatility, as recorded by pronounced and rapid variability in the ...
Nov 16, 2016 · The Proterozoic Earth saw many major evolutionary events from the Oxygen Catastrophe to the birth of the first plants and animals.