The Earth’s tectonic activity started more than 3.2 billion years ago, study finds
The Earth’s tectonic plates started moving more than 3.2 billion years ago – just over 1.3 billion years after the Earth first formed and earlier than originally thought. The outermost shell of the Earth is broken down into seven major tectonic plates and many smaller ones that move between 0.4 inches and 6.2 inches per … Read more