Convergent+Boundaries

__**Convergent Boundaries**__ move toward each other. They are also called Collision Boundaries. There are three kinds: **Oceanic-Oceanic**, **Oceanic-Continental**, and **Continental-Continental**.

__**Oceanic-Oceanic**__ boundaries are located in the ocean. One plate subducts under the other, since both are of high density and made of basalt. They create deep-sea trenches and volcanic island arcs. The most common example is the Aleutian Islands.

__**Oceanic-Continental**__ boundaries are located on the edge of continents. The oceanic plate subducts under the continental one because the continental plate has low density and is made of granite. This type of boundary creates a deep-sea trench and volcanic mountains on the edge of the continent. The most common example is the convergence of the Nazca and South American plates, which are forming the Andes.

__**Continental-Continental**__ are located between two landmasses. Neither can subduct under the other so they come together and form folded mountains. The most common example of this is the Indian Plate and Eurasian plate converging together, forming the Himalayas.