Question

What are the eight planet's history cast in stone and their meaning

Answer 1

After some long years of discoveries of geologists, the rock formations in the Barberton Mountain of South Africa were concluded to be 3.2 to 3.57 billion years old.  The discovery was formally known as “the history of our planet cast in stone”.  

The Barberton Mountain is also known as Makhonjwa Mountains that stretches around 120 kilometers in South Africa. Many geological scientists around the world had made a trail on the mountain in search of old rocks to decrypt the history of our beloved planet. The mountain was designated as World Heritage site right after the discoveries of such rocks.