Natures Clock. When sedimentary rock is deposited in layers it is deposited horizontally. Scientists use this Principle of Original Horizontality to help.
1/19/12
The Relative Age of Rocks 10-2. Place in order from youngest to oldest A B C D EF.
Evidence for Evolution 20Properties%20of%20Life.htm.
Radioactive Dating
Journal Entry #3 – Fossils and Relative Dating
