What happens at the battleground at plate boundaries? Divergent under the ocean When plates diverge under the ocean, magma. Tectonic plate interactions are of three different basic types: Divergent boundaries are areas Subduction zones occur where an oceanic plate meets a continental plate and is pushed underneath it. Obduction occurs when the continental plate is pushed under the oceanic plate, but this is unusual as the relative densities. At divergent boundaries, tectonic plates are moving away from each other. But if these huge masses of crust are moving apart, what happens in the space left.
Tectonic Plates and Plate Boundaries
The Andes is an example of this type of collision. Where continental crust meets continental crust Both continental crusts are too light to subduct so a continent-continent collision occurs, creating especially large mountain ranges. The most spectacular example of this is the Himalayas.
Divergent boundaries — where two plates are moving apart. The space created can also fill with new crustal material sourced from molten magma that forms below. Divergent boundaries can form within continents but will eventually open up and become ocean basins. On land Divergent boundaries within continents initially produce rifts, which produce rift valleys. Under the sea The most active divergent plate boundaries are between oceanic plates and are often called mid-oceanic ridges.
Interactives . Dynamic Earth . Slip, Slide, & Collide
Transform boundaries — where plates slide passed each other. The relative motion of the plates is horizontal.
They can occur underwater or on land, and crust is neither destroyed nor created. Because of friction, the plates cannot simply glide past each other.
List of tectonic plate interactions - Wikipedia
As the crust widens and thins, valleys form in and around the area, as do volcanoes, which may become increasingly active. Early in the rift formation, streams and rivers flow into the low valleys and long, narrow lakes can be created. Eventually, the widening crust along the boundary may become thin enough that a piece of the continent breaks off, forming a new tectonic plate. At this point, water from the ocean will rush in, forming a new sea or ocean basin in the rift zone.
Transform Boundaries — Grinding Plates At transform boundaries, tectonic plates are not moving directly toward or directly away from each other. Instead, two tectonic plates grind past each other in a horizontal direction. This kind of boundary results in a fault — a crack or fracture in the earth's crust that is associated with this movement.
Faults and Earthquakes Transform boundaries and the resulting faults produce many earthquakes because edges of tectonic plates are jagged rather than smooth. As the plates grind past each other, the jagged edges strike each other, catch, and stick, "locking" the plates in place for a time. Because the plates are locked together without moving, a lot of stress builds up at the fault line. This stress is released in quick bursts when the plates suddenly slip into new positions.
The sudden movement is what we feel as the shaking and trembling of an earthquake. The motion of the plates at a transform boundary has given this type of fault another name — a strike-slip fault.