<span>Thermohaline circulation is driven by differences by "Density." Thermohaline circulation is a single part of the large-scale ocean circulation. It is driven by global density differences that is being created by the freshwater fluxes and as well as the surface heat.</span>
We live in the lowermost layer of the atmosphere, known as "Troposphere"
Hope this helps!
Radioactive isotope with long half life would be the way to date a sample of rock that you suspect as being one of the earliest on Earth. Archaeologists very often use this method for checking the dates of the materials they excavate. I hope that this is the answer you were looking for and it has come to your help.
