Answer:
4 billion years
Explanation:
Scientists have found the oldest known rocks on Earth. They are 4.28 billion years old, making them 250 million years more ancient than any previously discovered rocks. Earth formed about 4.6 billion years ago from a disk of gas and dust circling the sun.
Greater, earths core is very hot and pressured.
The more you go down, the greater pressure and heat there is.
Answer:
a 1.7 million year history of dinosaurs off the Mississippi River delta
Explanation:
