Questions tagged [oceanic-crust]

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What caused the transverse "scarring" of the Atlantic Ocean floor [duplicate]

In Google Maps the floor of the Atlantic Ocean is shown as having much transverse "scarring". What are these crust formations? They're ~2,000 miles long. What caused them?
Tim's user avatar
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How is felsic magma produced at island arcs?

I previously believed that continental crust owes its lower density to the partial melting of oceanic crust; the mantle would partially melt at mid-ocean ridges to produce basaltic crust, and when ...
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