Precambrian time refers to the span of time from Earth’s formation to the start of the Cambrian period. This encompasses the Hadean, Archean, and Proterozoic eons and represents a significant portion of Earth's history, covering nearly 90% of the planet's geological timeline.
JWhat is Precambrian time?
the span of time between the Hadean and Proterozoic eons
the span of time from Earth’s formation to the start of the Cambrian period
the span of time dating from 540 million years ago to the turn of the first century
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