Asteroid impact started continental drift. Computer artwork representing the theory that asteroid impacts may have started the process by which the Earth's continents move relative to each other,known as continental drift. From left to right: An asteroid strikes the Earth in a weakened area (dark line) of the Earth's crust,created by the movement (curved arrows) of magma within the Earth's mantle. Magma (red) wells up through a hole created by the impact,creating a volcanic rift zone. The magma then solidifies (grey) on both sides of the rift zone causing the damaged crust to break apart (arrows). The rift then propagates along the weakened zone forming the first small continental plates,which are now free to move and drift on the convection currents within the mantle's magma | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Lunau, Claus |
Bildgröße: | 5172 px × 1724 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |