Indonesia is another example of an Ocean-Ocean convergent plate boundary. An oceanic plate (Cocos Plate) is subducted beneath another oceanic plate (Caribbean Plate) forming an oceanic trench to the west and active composite volcanoes that have coalesced into the isthmus of Central America.
How were the Indonesian islands formed?
Indonesian archipelago was formed due to convergence between Sunda oceanic plate (part of the Eurasian plate) and Indo-Australian plate whereas Philippine archipelago was formed due to convergence between Sunda oceanic plate and Philippine Sea plate. In ocean-ocean convergence, two oceanic plates converge or collide.
What type of plate boundary creates islands?
The new magma (molten rock) rises and may erupt violently to form volcanoes, often building arcs of islands along the convergent boundary. When two plates are moving away from each other, we call this a divergent plate boundary.
Which island arc is formed at convergent plate boundary?
The Aleutian Islands, an island arc off the Alaskan coast. An island arc is a unique type of island chain, mostly made up of clusters of volcanoes through an arc-shaped arrangement, situated close and parallel to the boundary between two converging tectonic plates.
What are the types of convergent plate boundary?
Convergent boundaries , where two plates are moving toward each other, are of three types, depending on the type of crust present on either side of the boundary — oceanic or continental . The types are ocean-ocean, ocean-continent, and continent-continent.
What type of plate boundary is Indonesia on?
The tectonics of Indonesia are very complex, as it is a meeting point of several tectonic plates. Indonesia is located between two continental plates: the Australian Plate (Sahul Shelf) and the Eurasian Plate (Sunda Shelf); and between two oceanic plates: the Pacific Plate and the Philippine Sea Plate.
Is Indonesia on a convergent plate boundary?
Weak Tectono-Magmatic Relationships along an Obliquely Convergent Plate Boundary: Sumatra, Indonesia.
What type of plate convergence creates volcanic island arcs?
When two oceanic plates collide against each other, the older and therefore heavier of the two subducts beneath the other, initiating volcanic activity in a manner similar to that which occurs at an oceanic-continental convergent plate boundary and forming a volcanic island arc.
What leads to the creation of island arcs?
Island arcs are formed when tectonic plates collide at a subduction zone in the ocean.
How are islands formed by plate tectonics?
When tectonic plates are pushed and pulled apart, they form volcanoes, causing eruptions when the plates are pulled apart. As hot magma rises from the crevasses created, it eventually builds up to form islands.
Which type of convergent plate boundary produces new mountain ranges?
Continental crust is too buoyant to subduct. When two continental plates converge, they smash together and create mountains. The amazing Himalaya Mountains are the result of this type of convergent plate boundary. The Appalachian Mountains resulted from ancient convergence when Pangaea came together.
What type of plate boundary is the Himalayas in South Asia located?
The Himalayan mountain range and Tibetan plateau have formed as a result of the collision between the Indian Plate and Eurasian Plate which began 50 million years ago and continues today.
Where are volcanic island arcs found?
An island volcanic arc forms in an ocean basin via ocean-ocean subduction. The Aleutian Islands off the coast of Alaska and the Lesser Antilles south of Puerto Rico are examples. A continental volcanic arc forms along the margin of a continent where oceanic crust subducts beneath continental crust.
Where is a convergent plate boundary?
In the ocean basins, convergent plate margins are marked by deep trenches in the sea floor. The convergent plate boundaries that occur on continents are the collisional mountain belts.
What are the 3 types of plate boundaries and where are they found?
There are three main types of plate boundaries:
- Convergent boundaries: where two plates are colliding. Subduction zones occur when one or both of the tectonic plates are composed of oceanic crust. …
- Divergent boundaries – where two plates are moving apart. …
- Transform boundaries – where plates slide passed each other.
What are the three types of convergence?
There are three types of convergent boundaries: Oceanic-Continental Convergence. Oceanic-Oceanic Convergence. Continental-Continental Convergence.