Crucially, all of these boundaries are interrelated, so a shift in one boundary impacts the others. For example, when basalt that bubbles up to the ocean floor at a mid-ocean ridge reaches the far edge of a plate it has to go somewhere. Often, it dips (subducts) beneath the neighboring plate and the high temperatures and pressure of the plates sliding by each other starts to melt the surrounding rock. The process helps create large masses of granite beneath the surface that can build up into mountain ranges and continents. Ultimately, this leads to the dynamic earth that we know – with earthquakes, and mountains, and volcanic eruptions.