How far down it is. Newer rock is on top, older rock is on the bottom
The skin on the palmar surface of the hands and feet forms ridges, so-called papillary ridges, in patterns that are unique to each individual and which do not change over time. Even identical twins (who share their DNA) do not have identical fingerprints.
Vain are the transportation system through the body
All that is needed is a warmer, lighter fluid below a cooler, heavier one.
Since warm water is lighter, it will rise, and will cool from the top will flow down to replace it, this makes it go in motion
The layers above would be not as old and the layers below would be the older layers.
