But one well-regarded theory is the crack hypothesis, which assumes that hot spots are created when a piece of the crust gets stretched thinner and thinner and the resulting stress causes small cracks, to open up at weak spots in the crust, and it's through these cracks that magma pushes...
What is magma? What is lava? Magma is molten rock that is below the Earth’s surface.Lava is molten rock once it erupts onto the surface of the Earth. Why do earthquakes occur? When plates move towards or grind past each other, pressure builds up. When the pressure is released, an ...
And yet, you have vast amounts of magma—molten rock or lava—flowing up through the Earth's crust … which means, of course, that volcanic activity there can't be explained simply by plate tectonics. So … how do we explain these volcanic anomalies... these exceptions to the general ...
theory is the crack hypothesis … which assumes that hot spots are created when a piece of the crust gets stretched thinner and thinner, and the resulting stress causes small cracks to open up at weak spots in the crust …and it's through these cracks that magma pushes up to form ...