Compare and contrast the 3 types of convergent boundaries.

1. oceanic-continental the denser oceanic plate will sink under the lighter continental plate, forming ocean trench
2. oceanic-oceanic the denser and older plate will sink under the lighter and newer plate
3. continental-continental no subduction will occur, thus no volcanic activities. forms fold mountains

Magma forms by partial melting of upper mantle and crust. partial melt means that only a fraction of the available material forms a melt, and that the remainder stays solid. the partial melt rises because of its lower density and ascends through he crust. this is so conclusive mean the answer would be magma igneous rocks or balistic magma.