Question

Oceanic crust spreads at ____1_______, creating new crust and slowly enlarging the ocean basin. _____2_______ are deep valleys at passive continental boundaries. They are likely eroded by ____3____, 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 _____4_______ on continents, or ____5________in the ocean.

Answer 1

Answer:

• 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.