How do the continental drift and sea floor spreading support the theory of plate tectonics?
Seafloor spreading disproves an early part of the theory of continental drift. Supporters of continental drift originally theorized that the continents moved (drifted) through unmoving oceans. Seafloor spreading proves that the ocean itself is a site of tectonic activity.
How does subduction cause the formation of landmass like mountains and volcano?
The first is mountain formation. Subduction zones always have mountain ranges caused by plate subduction. The next is volcanic activity as a plate is subducted the pressure and heat turns it into magma. These pockets of magma find paths to the surface and create volcanoes.
How does the theory of plate tectonics explain the location of volcanoes earthquakes and mountain belts on Earth?
The theory of plate tectonics describes the motion of Earth’s plates and their role in geological processes, such as mountain building, earthquakes, and volcanoes. When two continental plates converge, neither is subducted. Rather, the crust is uplifted to form towering mountain ranges, such as the Himalayas.
How does the formation of mountains and volcanoes relate to the modern theory of plate tectonics?
Movements of tectonic plates create volcanoes along the plate boundaries, which erupt and form mountains. A volcanic arc system is a series of volcanoes that form near a subduction zone where the crust of a sinking oceanic plate melts and drags water down with the subducting crust.
What is the evidence that supports the theory of plate tectonics?
Evidence from fossils, glaciers, and complementary coastlines helps reveal how the plates once fit together. Fossils tell us when and where plants and animals once existed. This distribution of fossils led to theories that the southern continents were once joined in a supercontinent called Gondwana.
Which is the oldest landmass on Earth?