Geology forums

Definition Plate tectonics is the theory that Earth's outer shell is divided into several plates that glide over the mantle, the rugged inner layer over the core. The plates act like a tough and stiff shell in contrast to Earth's mantle. This powerful outer layer is called the lithosphere, which is 100 kilometers (60 miles) thick, according to Encyclopedia Britannica. The lithosphere includes the crust and outer part of the mantle. Below the lithosphere is that the asthenosphere, which is malleable or partly malleable, allowing the lithosphere to move around. The way that it moves around is an evolving notion. History Developed from the 1950s through the 1970s, plate tectonics is the contemporary version of continental drift, a theory first proposed by scientist Alfred Wegener in 1912. Wegener didn't have an excuse for how continents could move across the planet, but investigators do today. Before plate tectonics, individuals had to produce explanations of the geologic char

Definition of Geology Geology is the study of the Earth, the materials of which it is made, the structure of these materials, as well as the processes acting upon them. It includes the study of organisms that have inhabited our world. An important part of geology is the study of how Earth's materials, structures, processes and organisms have changed over time. There are only a few Geology forums to seek answers to your questions. Join Geology Buzz to meet the amazing community of Geologists. Geological development of an area The geology of an area changes through time as rock units are deposited and added, and deformational processes change their shapes and locations. Deposition can happen when sediments settle on the surface of the planet and afterwards lithify into sedimentary rock, or when as submerged material like volcanic ash or lava flows quilt the surface. Igneous intrusions like batholiths, laccoliths, dikes, and sills, push upward into the overlying rock, and crystallize