PLASTICLIKE LAYER BELOW THE LITHOSPHERE

CONTINENTS HAVE MOVED SLOWLY TO THEIR CURRENT LOCATION.

THIS ENTIRE CYCLE OF HEATING, RISING, COOLING, AND SINKING

THIS RIGID LAYER IS ABOUT 100KM THICK AND GENERALLY IS LESS DENSE.

IT MEANS ALL LAND

MOVE ON A PLASTICLIKE LAYER OF THE MANTLE.

EARTHS CRUST AND PART OF THE UPPER MANTLE ARE BROKE INTO SECTIONS.

PROPOSED THAT HOT LESS DENSE MATERIAL BELOW EARTH CRUST RISES.