What will form when two oceanic plates collide?
A subduction zone is also generated when two oceanic plates collide — the older plate is forced under the younger one — and it leads to the formation of chains of volcanic islands known as island arcs.
What happens when two plates of the same density collide?
When two plates (either oceanic or terrestrial) converge and they are of similar density then they will crash into each other and form mountains. A great example of this is when India crashed into the Asian continent and the Himalayas were formed.
What happens when two continents collide along a convergent plate boundary?
If two tectonic plates collide, they form a convergent plate boundary. Usually, one of the converging plates will move beneath the other, a process known as subduction. The new magma (molten rock) rises and may erupt violently to form volcanoes, often building arcs of islands along the convergent boundary.
What is the characteristic plate motion of a transform fault boundary?
Segmentation of oceanic plate boundaries. A transform fault is a plate boundary along which the relative motion between the two plates is parallel to the strike of the fault and is geometrically the arc of a small circle about the pole of rotation between two plates.
When two plates move together lithosphere is quizlet?
Convergent Boundaries: occurs where two plates move together, oceanic lithosphere plunging beneath an overriding plate.
Is the lithosphere destroyed at Transform plate boundaries?
At transform boundaries lithosphere is neither created nor destroyed. Many transform boundaries are found on the sea floor, where they connect segments of diverging mid-ocean ridges. California’s San Andreas fault is a transform boundary.
What is the largest lithospheric plate?
Pacific Plate
What is it called when two plates are descending under the other?
Subduction occurs when two plates collide at a convergent boundary, and one plate is driven beneath the other, back into the Earth’s interior.
What are the four driving forces behind plate motion?
The forces that drive Plate Tectonics include: Convection in the Mantle (heat driven) Ridge push (gravitational force at the spreading ridges) Slab pull (gravitational force in subduction zones)
What landforms are created by divergent boundaries?
Two landforms that are created from divergent boundaries are rift valleys and mid-oceanic ridges.
What are 3 things that are formed at a divergent boundary?
Effects that are found at a divergent boundary between oceanic plates include: a submarine mountain range such as the Mid-Atlantic Ridge; volcanic activity in the form of fissure eruptions; shallow earthquake activity; creation of new seafloor and a widening ocean basin.
Do earthquakes happen at divergent boundaries?
Shallow, low-magnitude earthquakes commonly occur at divergent plate boundaries. This causes the crust to crack and form faults where earthquakes occur. Most earthquakes at divergent plate boundaries occur at mid-ocean ridges where two pieces of oceanic crust are moving away from each other.
What landforms are caused by earthquakes?
The boundaries where the tectonic plates meet are the areas of the world with the most violent natural earthquake activity. When the plates grind against each other along plate boundaries, the rocks are under so much pressure that sometimes they heat up and fold, creating mountain ranges, hills and valleys.
Do earthquakes occur at this type of plate boundary?
Most earthquakes occur at the boundaries where the plates meet. Earthquakes at transform faults tend to occur at shallow depths and form fairly straight linear patterns. Subduction zones are found where one plate overrides, or subducts, another, pushing it downward into the mantle where it melts.
What are the 4 types of plate boundaries?
- Divergent boundaries — where new crust is generated as the plates pull away from each other.
- Convergent boundaries — where crust is destroyed as one plate dives under another.
- Transform boundaries — where crust is neither produced nor destroyed as the plates slide horizontally past each other.