Oceanic crust spreads at creating new crust and slowly enlarging the ocean basin. are deep valleys at passive continental boundaries. they are likely eroded by which occur when sediment-laden water rapidly moves down slope. melt from the subducting plate rises to the surface, erupts through the crust on the overriding plate and forms on continents, or the ocean.

1. Mid-ocean ridges.2. Submarine canyons.3. Turbidity currents.4. Continental volcanic arcs.5. Volcanic island arcs.

Explanation:

The new oceanic crusts are created in the mid-oceanic ridges and the oceanic submarine canyons are those that are enlarged by sedimentary basins and the occurrence of the turbidity of the current leads to the formations of sediment-laden water and that rapidly moves down the continental slopes and has vertical walls. The continental arcs form in the areas of the continental zones and here the continental crust gets subducted. And in a similar way, the volcanic islands arcs are formed in the oceans.