ทฤษฎีทวีปเลื่อน ในปี ค.ศ.1915 นักวิ

The theory of continental drift In the year 1915 The name Alfred Wegener, German scientist proposed a hypothesis of continental drift up and accepted in 1940. The assumption said around 250 million years ago. Continents as a large continent ever called Pangea later movement separate from the current position up to address. Evidence of this movement believe that the sheet is current in the continent have found the rock types occur in the same environment, but on a different continent, which is very different from the same stone age. Outside the continent, together with Earth's magnetic field pattern similar to ancient. And the edge of the continent, the bridge can be close together.The theory of the Earth's crust under the oceans. From the phenomenon and separate plates of the Earth's crust under the oceans and continents in relation to ground motion. The occurrence of volcanic islands. The birth lies mountains. Expansion and rebirth of the ocean causes the assumptions and become this theory to explain the various phenomena up to them and the movement of the Earth's crust and various plates.