WebThe Mid-Atlantic Ridge is the longest mountain chain on Earth. These ridges are spreading centers or divergent plate boundaries where the upwelling of magma from the mantle creates new ocean floor. Deep-sea trenches are long, narrow basins which extend 8-11 km below sea level. Trenches develop adjacent to subduction zones, where oceanic ... WebNov 10, 2024 · In places where spreading is fastest (more than 80 millimeters, or 3 inches, per year), the ridge has relatively gentle topography and is roughly dome-shaped in cross-section as a result of the many layers of lava that build up over time.
What are Ocean Trenches and How are They Formed?
WebSep 27, 2024 · On a trench’s outer slope (the oceanic side), the slope is gentle as the plate gradually bends into the trench. On the inner slope (continental side), the trench walls are much more steep. The types of … WebFeb 28, 2024 · Under-water trenches and ridges are created by plate tectonics. The crust of the earth is covered with Oceanic and Continental plates. These plates are moving … software essex
Plate Boundaries - National Geographic Society
WebJun 2, 2011 · The opposite of a trench would be an embankment, berm, or dike.(the opposite of a marine trench is a seamount or ridge) What is fault ridges rift valley trench fissure? Web1. Convergent boundaries - two plates collide to form mountains or a subduction zone. 2. Divergent boundary - two plates are moving in opposite directions as in a mid-ocean ridge. 3. Transform boundary - two plates are sliding past each other as in the San Andreas fault of California. A transform boundary is like a tear in the Earth's crust. WebJan 17, 2024 · When two oceanic plates meet, the older plate subducts. Oceanic lithosphere is formed hot and thin at mid-ocean ridges and grows thick as more rock hardens underneath it. As it moves away from the … software estimate costs construction