Layer 1 was deposited was the third layer to be deposited because it is at the top.
Intrusion 2 formed is formed sixth because it's an intrusion but it hasn't reached the top layer yet.
Intrusion 3 formed is formed fourth because it's an intrusion which means its younger then the layers.
Layer 4 was deposited is the first to be deposited because it is the lowest which means it was there first.
Layer 5 was deposited is the second one to be deposited because it is the second lowest.
Earth cracked at fault B was formed last because of the Principle of Initial Horizontality.
