Sea Floor Scraping

Seafloor spreading and other tectonic activity processes are the result of mantle convection.

Sea floor scraping.

Seafloor scraping september 28 2020 antarctica journal bottom trawling nets which scrape up anything in their path in pursuit of fish have left their mark on 20 million sq. What do we really know about seafloor spreading and how ocean crust is generated at the earth s mid ocean ridges. Maps and other data gathered during the war allowed scientists to develop the seafloor spreading hypothesis this hypothesis traces oceanic crust from its origin at a mid ocean ridge to its destruction at a deep sea trench and is the mechanism for continental drift. 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.

What actually is the moho seismic horizon beneath the ocean floor long taken as the boundary between crust and the mantle. 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. Seafloor spreading definition a process in which new ocean floor is created as molten material from the earth s mantle rises in margins between plates or ridges and spreads out. The ocean is so vast and there are so many things we can learn from it.

This video demonstrates how the change in direction of earth s magnetic field creates bands of rock with different magnetic orientations. Check out this video about the sea floor spreading and learn more at cimioutdoored or. Mantle convection is the slow churn ing motion of earth s mantle. Seafloor spreading is a geologic process in which tectonic plate s large slabs of earth s lithosphere split apart from each other.

52 million sq km of seafloor. World war ii gave scientists the tools to find the mechanism for continental drift that had eluded wegener.