The correct answer is Precambrian.
The Precambrian is the first geological eon in the history of Earth. It began 4.543 billion years ago with the formation of Earth and ended 541 million years ago with the beginning of the Cambrian period. The Precambrian is the longest eon in Earth’s history, spanning over 4 billion years.
The Precambrian is divided into three eras: the Hadean, Archean, and Proterozoic. The Hadean era was the earliest era in Earth’s history, lasting from 4.543 billion years ago to 4 billion years ago. The Archean era lasted from 4 billion years ago to 2.5 billion years ago. The Proterozoic era lasted from 2.5 billion years ago to 541 million years ago.
The Precambrian is a time of great geological activity. The Earth’s crust was constantly being formed and reformed, and the continents were constantly moving. The Precambrian is also a time of great biological activity. The first life on Earth appeared in the Precambrian, and the first multicellular organisms appeared in the Proterozoic era.
The geological formations of Chhattisgarh are predominantly Precambrian. The Precambrian rocks of Chhattisgarh are mostly igneous and metamorphic rocks. The igneous rocks were formed when magma cooled and solidified, and the metamorphic rocks were formed when existing rocks were subjected to heat and pressure.
The Precambrian rocks of Chhattisgarh are important because they provide information about the early history of Earth. The rocks can be used to study the formation of the Earth’s crust, the movement of the continents, and the evolution of life on Earth.
The other options are incorrect because they are not the predominant geological formations of Chhattisgarh. The Paleozoic era lasted from 541 million years ago to 252 million years ago. The Mesozoic era lasted from 252 million years ago to 66 million years ago. The Cenozoic era began 66 million years ago and continues today. The Paleozoic, Mesozoic, and Cenozoic eras are all younger than the Precambrian era.