What do you understand by continental continental drift theory?
Answers
Continental drift is the theory that the Earth's continents have moved over geologic time relative to each other, thus appearing to have "drifted" across the ocean bed.The idea of continental drift has since been subsumed by the theory of plate tectonics, which explains that the continents move by riding on plates of the Earth's lithosphere.
Answer:
Alfred Wegener 18801930 a German meteorologist and geologist, was the first person to propose the theory of continental drift. In his book, Origin of Continents and Oceans, he calculated that 200 million years ago the continents were originally joined together, forming large supercontinent. He named this supercontinent Pangaea, meaning All-earth.
The Earth's crust is not a single continuous layer. It is made up of a number of gigantic pieces like a huge jigsaw puzzle.
Each piece is called a crustal plate. Currents of molten rock rise up through the mantle like boiling water in a saucepan.
These form convection cells that drive the movement of the plates so that they are continuously moving away or towards each other. Geologically, the most important things happen at the plate boundaries, including most of the earthquakes, volcanoes, igneous rocks, major metamorphism, and mountain building processes.