Using examples, outline the differences between the activity and resultant landforms at Convergent Continental/Continental plate boundaries and Convergent Continental/Oceanic plate boundaries

At a convergent continental continental plate boundary such as the Indian and Eurasian plates, neither of the two plates subduct due to both being low in buoyancy. However the collision can cause one of the two plates - in this case the Eurasian plate - to crumple and buckle up above the other. The compressional force induced by the collision and lack of subduction causes the continental crust to fold and fault thus thickening it and pushing the bedrock (i.e. the Himalayas) upwards. While mountain ranges such as the Himalayas form at convergent continental continental plate boundaries, volcanic activity does not occur as the thickened crust delays the rise of magma thus cooling it before reaching the surface.In contrast, convergent continental/oceanic plates such as the Nazca and South American plates involve the subduction of the oceanic plate (Nazca) beneath the continental plate (South American) due to its density. The friction between the plates reduces the smoothness of the oceanic plates' subduction and thus is begins to drag against the continental plate as it descends, creating fractures and deformations in the process. Resultant earthquakes of shallow focus frequently occur. Mountain ranges also form due to the folding of the rocks at the leading edge of the continental plate boundary - in this instance, the South American plate. Crustal shortening reduces the width of the crust while increasing its vertical thickness thus emerges fold mountains such as the Andes.