The large sections of the lithosphere are called tectonic plates. These plates are made up of the crust and upper mantle of the Earth, and they sit on top of the asthenosphere.Continue Reading
The tectonic plates are an important part of understanding the evolution of the appearance of the Earth through the years. In general, the plates measure about 100 to 200 kilometers thick. Underneath these tectonic plates, the hot asthenosphere moves and causes the movement of the plates above.
The movement of these plates causes the land masses to slowly move. Earth looks very different in modern times than millions of years ago. Continents collide and move apart as a result of the plates. The movement of two plates against one another causes earthquakes and forms mountains.Learn more about Geology
According to the University of California, Santa Cruz, most hydrothermal metamorphism occurs at the boundaries of oceanic plates. The plates move apart and allow seawater to percolate through the oceanic crust.Full Answer >
Folded mountains, or fold mountains, form when two tectonic plates within the Earth's crust push against each other, generating pressure sufficient for creating large mounds. Fold mountains exist primarily in mountain ranges, and develop over many years. The process of mountain creation begins as two tectonic plates move apart from each other, then gradually move inwards again, forcing deposits of sedimentary rock upwards.Full Answer >
Marble is a soft metamorphic rock that forms at the edges of tectonic plates, where limestone is exposed to regional metamorphism. The heat and pressure of the metamorphic zone force calcite inside the limestone to recrystallize and merge into the classic marble consistency.Full Answer >
The most common type of igneous rock, basalt, also known as malfic rock, can be found on oceanic plates at divergent plate boundaries. Intermediate and felsic igneous rocks show up along continental margins, as well. Because igneous rocks form from the cooling of lava and magma, they can be found around areas where volcanic activity is or has been present.Full Answer >