The Pacific tectonic plate is the largest tectonic plate on Earth, covering a significant portion of the Pacific Ocean. It is primarily an oceanic plate, meaning it is mostly made up of oceanic crust. This plate is bordered by several other tectonic plates, including the North American plate and the Philippine Sea plate, and is known for its active geological features, such as earthquakes and volcanic activity. The movement of the Pacific tectonic plate is driven by the heat from the Earth's interior, causing it to shift and interact with neighboring plates. This interaction leads to the formation of various geological structures, including mountain ranges and ocean trenches, such as the Mariana Trench, which is the deepest part of the world's oceans.