Continental-continental convergence occurs when two tectonic plates, both composed of continental crust, collide. This type of boundary does not create subduction, as both plates are buoyant and resist sinking into the mantle. Instead, the collision leads to the formation of mountain ranges, such as the Himalayas, which were created by the collision of the Indian Plate and the Eurasian Plate. As the plates push against each other, they can cause intense geological activity, including earthquakes. The pressure from the collision can also result in the folding and faulting of the crust, creating complex geological structures. This process is a key factor in shaping the Earth's surface over millions of years.