GENERAL GEOLOGY

Detailed explanation-1: -The Precambrian simply refers to the time interval and all rocks that formed prior to the beginning of the Cambrian Period (base of Phanerozoic Eon) at 541 Ma. The interval with no preserved rock record from the formation of the Earth at 4.567 to ca.

Detailed explanation-2: -The Precambrian (or Pre-Cambrian, sometimes abbreviated pꞒ, or Cryptozoic) is the earliest part of Earth’s history, set before the current Phanerozoic Eon.

Detailed explanation-3: -Precambrian Resources The Precambrian is divided into three eons highlighted below, from youngest to oldest: Hadean, Archean, and Proterozoic.

Detailed explanation-4: -Precambrian time covers the vast bulk of the Earth’s history, starting with the planet’s creation about 4.5 billion years ago and ending with the emergence of complex, multicelled life-forms almost four billion years later.

Detailed explanation-5: -The Precambrian encompasses the Archean and Proterozoic eons, which are formal geologic intervals that lasted from 4 billion to about 541 million years ago, and the Hadean Eon, which is an informal interval spanning from 4.6 billion to 4 billion years ago.