old crust

Where Does The Old Crust Move When The Seafloor Spreads?

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Where Does The Old Crust Move When The Seafloor Spreads? During sea-floor spreading, oceanic crust forms at the mid-ocean ridge. This crust gradually moves toward a subduction zone, where old crust sinks beneath a trench. As sea-floor spreading occurs, old oceanic plates sink into the mantle in the process of subduction. Subduction zones are near

Where Does Old Oceanic Crust Sink Down And Melt Back Into Magma?

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Where Does Old Oceanic Crust Sink Down And Melt Back Into Magma? When the (typically very old) oceanic crust sinks back into the mantle in a subduction zone, it comes progressively under greater pressure and temperature. Where does the old crust get pushed down and get melted back into magma? Old crust is pushed back