Discovery Science: Earth – Water – Oceanic Crust
Earth Science: Earth – Water – Oceanic Crust Oceanic crust covers two-thirds of the Earth’s surface. Crustal rocks are relatively recent, with none older than 200 million years, and they are constantly in motion. This movement expands the oceans and shifts entire continents. The oceanic crust begins beyond the flooded part of the continental shelf. … Read more