Approximately 180 million years
All continents were united in one super continent known as Pangaea. according to Wegener, an observation into the shape and designs of the continents reveals that all the continents were once one large mass. the continent begun to split approximately 180,000 million years ago.
Answer:
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<span>Japan launched a sneak attack on the American naval base at Pearl Harbor Hawaii.</span>
<span>The correct answer is the astenosphere. It's part of the earth's crust that's just below the lithosphere and it's really susceptible to plastic flow because the resistance to it is very low. This is where scientists believe that convection occurs in the mantle. It's a very weak and easily deformed piece of the crust.</span>
