Blobs of rock-inside the earth

        Two massive blobs-like structure lie deep within earth,roughly on opposite sides of planet. There are two structure. One is the size of a continent 100 times taller than Mount Everest and another one is sit on the core 1,800miles deep.
         The blobs are also called "thermochemical piles." The two blobs sit in the mantle on the top of Earth's core,underneath pacific ocean on one side and beneath Africa and Atlantic ocean.