![]() ![]() Plate tectonics is the movement of lithospheric plates relative to each other.Seafloor spreading describes the movement of oceanic plates relative to one another.Polar wandering is the relative movement of the earth’s crust and upper mantle with respect to the rotational poles of the earth.Polar wandering (similar to Continental Drift Theory) Continental drift refers to the movement of the continents relative to each other.Important concepts that tried to explain the tectonic processes Continental Drift Theory (CDT) It deals with the folding and faulting associated with mountain building the large-scale, gradual upward and downward movements of the crust (epeirogenic movements) the growth and behaviour of old cores of continents known as cratons and sudden horizontal displacements along faults.It is basically about understanding the large-scale deformation of the lithosphere ( crust and upper mantle above asthenosphere) and the forces that produce such deformation.Tectonics is the scientific study of forces (convection currents in the mantle) and processes (collisions of the lithospheric plates, folding, faulting, volcanism) that control the structure of the Earth’s crust and its evolution through time.These important discoveries led to the field of tectonics in geology. Ridges and trenches gave insights into natural boundaries between various lithospheric plates (tectonic plates).During WW II, it was discovered that the ocean floor had some unique relief features like ridges, trenches, seamounts, shoals etc. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |