Seafloor Spreading Theory Upsc

Convection currents in the mantle.

Seafloor spreading theory upsc. Mapping of sea floor in 1950s 3. E g tidal forces and centrifugal forces are too small to bring such changes magnetite striping and seafloor spreading pacific ring of fire etc. It opened up a whole new paradigm for the study of geomorphology. As the lesson starts bhumika briefs about the conventional current theory.

Convection current theory is the soul of seafloor spreading theory. Seafloor spreading theory mapping of the ocean floor. Thus the midocean ridges contain the newest crust formed on the planet. 2009 discuss views on slope development provided by l c.

Geomorphology theories of origin and evolution of earth. Geography of upsc cse. 2008 highlight the geomorphic features essentially found in topographies under the second cycle of erosion. That is it explains why the age thickness and density of the oceanic crust increases with distance from the mid oceanic ridge.

Body after mentioning that theory of plate tectonics is an improvement over theory of continental drift divide the body into parts and present evidences facts in favour of your stand. After the second world war the understanding of ocean floor significantly changed. Volcanic eruptions create new basaltic ocean floor that then spreads away laterally from the ridge. Further she describes the process on how exactly the sea floor spreading is occurring.

Known as seafloor spreading this theory stated that mid ocean ridges are formed by currents of magma rising up from the mantle. The evidence which proves the seafloor spreading are also discussed in detail. Seafloor spreading theory that oceanic crust forms along submarine mountain zones known collectively as the mid ocean ridge system and spreads out laterally away from them. Also the following six developments were instrumental in the formulation of the theory of plate tectonics.

Arthur holmes in 1930s discussed the possibility of convection currents in the mantle. This idea played a pivotal role in the development of the theory of plate tectonics which revolutionized geologic thought during the last quarter of the 20th century. With the emergence of the concept of seafloor spreading and wealth of new evidence at the beginning of the 1950s and 1960s the interest in the problem of distributions of oceans and continents was revived. These currents are generated due to radioactive elements causing thermal differences in the mantle.

Sea floor spreading theory is important for the upsc prelim and main exam. Write a short note on seafloor spreading theory. 3 questions raised after sea floor mapping 4.