The continents are connected to shifting tectonic plates, none of them actually float on the water; but instead float on the earth’s mantle, which is composed of magma.
The earth’s lithosphere (the crust and upper mantle) is theoretically composed of fourteen different plates, seven of which are considered major plates and make up the largest portion of the lithosphere. They are connected, and make up both the continental and the oceanic lithosphere, so it is more accurate to say that the water rests on top of the plates themselves, not the other way around. These plates converge, diverge, and move against each other in a parallel motion at their boundaries. These movements are the source of the earth’s building processes because they cause volcanoes, mountains, earthquakes and faulting to occur.
Click here to cancel reply.
Sorry,At this time user registration is disabled. We will open registration soon!
Don't have an account? Click Here to Signup
© Copyright GreenAnswers.com LLC