The book may be divided roughly into three nearly equal parts, dealing respectively with the origin and past history of the earth (considered as a basis for conclusions about its present condition ...
Earth formed 4.54 billion years ago. The first period of the history of the Earth was known as the Hadean Period which lasted from 4.54 billion to 4 billion years ago. During that time, Earth was ...
Earth's tectonic history is what it is because of our planet's material composition. It's not like this on all planets, nor even all the rocky planets in our own solar system. However, the garnet ...