It is here that new ocean floor is continuously created. As the two sides of the mountain move away from each other, magma wells up from the Earth's interior. It then solidifies into rock as it is ...

With the discovery of plate tectonics and the mapping of the earth into about 12 plates, plus the understanding that plates' movement caused earthquakes, Alfred Wegener's idea of "continental ...

Most people think the bottom of the ocean is like a giant bathtub filled ... Chain as it steamed back and forth across the continental margin off the East Coast, equipped with an instrument ...