What types of crust interact at convergent plate boundaries?

At convergent plate boundaries, two types of crust can interact: oceanic crust and continental crust. There are three main scenarios where crusts can converge:

1. Oceanic-Oceanic Convergence: When two oceanic plates collide, one of the plates is usually subducted, or forced under the other. The subducting plate is driven into the mantle where it begins to melt. This can result in volcanic activity and the formation of a chain of volcanic islands, often referred to as an island arc.

2. Oceanic-Continental Convergence: When an oceanic plate converges with a continental plate, the denser oceanic plate is subducted beneath the lighter continental plate. This also leads to volcanic activity due to the melting of the subducted oceanic crust, which can create a line of volcanoes on the continent, known as a volcanic arc.

3. Continental-Continental Convergence: When two continental plates converge, neither is easily subducted due to their buoyancy. Instead, they tend to collide and compress, which can lead to the creation of large mountain ranges such as the Himalayas.