Classic plate tectonics concepts suggested that continents do not subduct. Instead, when two continents collide at a convergent boundary following the consumption of an ocean by subduction, they accommodate the shortening within the lithosphere, which is thickened up to twice the normal values.

Can continental plates be subducted?

As the temperature and pressure rise, fluid is released from the slab and migrates along the thrusts, lubricating them and making it possible for the continental lithosphere to be subducted with the upper crust, producing feeble features of collision.

Why are continental plates usually not subducted?

When two continental crusted plates converge, they eventually collide and end up producing mountains; this was how the Himalayan Mountains were created. Neither continental crust will subduct underneath one another because of their similar densities.