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What happens when ocean crust and mantle after subduction?
When ocean crust and mantle are subducted, the oceanic crust descends into the mantle, where it eventually reaches a depth where it melts due to the high temperatures and pressures. This molten material can rise back to the surface through volcanic activity, forming island arcs or volcanic mountain ranges. The subducting crust can also undergo partial melting, which can alter the composition of the mantle wedge above the subduction zone.
What happens when the ocean crust sinks deeper inyo the mantle?
When oceanic crust sinks deeper into the mantle at subduction zones, it undergoes partial melting due to the increase in temperature and pressure. This melted material can then rise back to the surface to form volcanoes and contribute to the formation of new crust through volcanic activity. This process is integral to the recycling of Earth's crust and the formation of oceanic trenches and volcanic island arcs.
What part of the ocean spreads when old crust melts?
mid-ocean ridge
What happens when the top of the iceberg melts in a salty ocean?
... it melts... and becomes part of the ocean.
What is below the ocean floor?
Crust mantle core
What happens to oceanic crust in most ocean - continent collisions?
In most ocean-continent collisions, the denser oceanic crust subducts beneath the lighter continental crust. This process leads to the formation of deep ocean trenches and volcanic arcs on the continental side. As the oceanic plate descends into the mantle, it melts and contributes to the formation of magma, which can result in volcanic activity. Over time, this subduction can also cause significant geological features and seismic activity in the region.
At deep ocean trenches what allows oceanic crust to sink back into the mantle?
Conduction. Heat istransferred from the mantle to the crust, melting it to become part of the mantle.
At divergent plate boundaries in the ocean magma rises and melts because of what?
Magma rises and melts at divergent plate boundaries in the ocean due to the decompression melting that occurs as tectonic plates move apart. As the plates separate, pressure on the mantle decreases, causing the mantle to melt and create magma that rises to the surface, forming new oceanic crust.
Is there magnetic strips on the ocean floor are places where oceanic crust sink back to the mantle?
Is there magnetic stripe son the ocean floor are places where oceanic crust sink back to the mantle
Oceanic crust returns to the mantle at deep ocean trenches which are?
rocks
Do magnetic stripes on the ocean floor oceanic crust sink back into the mantle?
No, the magnetic stripes on the ocean floor form due to the alignment of magnetic minerals in the crust as it solidifies from the mantle. The oceanic crust is eventually consumed in subduction zones and recycled back into the mantle, but the magnetic stripes themselves do not sink back into the mantle.
Are the plates of the crust floating in the ocean?
No. According to scientific theory, tectonic plates of the lithosphere (the Earth's crust and outermost mantle) are below the ocean.
