It reaches the location where warm mantle material rises and the mantle convection cell is complete.
Why didnt granite sink down into eaths mantel.
The mantle is the mostly solid bulk of earth s interior.
The mantle lies between earth s dense super heated core and its thin outer layer the crust.
Convection in the mantle is the same as convection in a pot of water on a.
At the bottom of the mantle the material travels horizontally and is heated by the core.
The mantle is about 2 900 kilometers 1 802 miles thick and makes up a whopping 84 of earth s total volume.
There is no basalt under the continent s granite.
This process also hinges on the presence of water which forms a necessary ingredient in an important early crystallizing mineral called amphibole campbell says.
It eventually becomes cool and dense enough to sink back down into the mantle.
The mantle extends down to 2 890 km into the earth s surface temperatures that range from 500 to 900 degrees celsius in the upper portion to over 4 000 degrees celsius near the core boundary.
It also extracts the so called incompatible elements which don t fit into mantle minerals and move into the liquid melt.
The earth has gas.