what is sea floor spreading
Haha no ones answering your question...have you tried googleing it? common sense if you ask me instead of wasting time on here...
Too make it effortless. Rocks interior the oceanic crust are continuously being recycled. they are subdued and melted at subduction zones and created at divergent zones. think of approximately it this way. Magma will enhance and cools at divergent zones, as extra magma will enhance and extra rocks are created, the older rocks are moved far off from the divergent zone. After thousands and thousands of years, that rock is going to reach at a subduction zone and circulate into the asthenosphere the place this is going to soften and grow to be magma returned and consequently being recycled. it somewhat is the rationalization for which the older rocks stumbled on interior the sea are in simple terms a hundred and eighty thousands and thousands years old.
Sea floor spreading happens at mid-oceanic ridges. It is one way that the plate tectonics theory is explained - why the continents move. What happens is that due to convection (hot material rising from the mantle to the surface, cooling off, then falling down in a cycle) pushes the oceanic crust apart at the ridge, allowing molten material to come to the surface, then cool when it comes in contact with the ocean, forming new oceanic crust. This also simultaneously on the other side of the plate causes subduction, in which one plate goes under the other, turning the oldest oceanic crust back into magma as it melts into the mantle. This animation might help: education.sdsc.edu/optiputer/flas... It's a difficult concept to explain without drawing a picture or something. Good luck!
