What is precambrian time? the span of time from earth’s formation to the start of the cambrian period the span of time between the hadean and proterozoic eons the span of time dating from 540 million years ago to the turn of the first century

The answer is the span of time from Earth's formation to the start of the Cambrian period. It is the period of time that extends from about 4.6 billion years ago; a point when the earth formation began, to the beginning of the Cambrian period, 541 million years ago. It represents more than 805 of the geologic record.