That, i believe, would be the Geosphere
The inner core is solid because it is made of very dense, or heavy, materials - like iron and nickel. Even though it is very hot, these materials don't "melt" very easily, so they stay solid. Also, pressure due to the weight of the mantle and crust, atoms are forced together as solid.
Is it north of brisbane ?!
( I apologize if the answer is wrong)
Canada and Mexico . are the two countries