A boundary formed where two tectonic plates bump into each other is called a convergent boundary. At these boundaries, the plates move toward each other and collide. Depending on the types of crust involved, different geological features can form:

• When an oceanic plate meets a continental plate, the denser oceanic plate is forced beneath the continental plate in a process called subduction , creating deep ocean trenches and volcanic arcs on the continent above

• When two continental plates collide, neither plate subducts due to their similar densities. Instead, the crust is compressed and pushed upward, forming large mountain ranges such as the Himalayas

• When two oceanic plates converge, one subducts beneath the other, forming deep trenches and volcanic island arcs

Convergent boundaries are associated with intense geological activity including earthquakes, mountain building, and volcanism

. In summary, the boundary where two plates bump into each other is a convergent boundary , characterized by collision, subduction, mountain formation, trenches, earthquakes, and volcanoes depending on the plate types involved.