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.
Geography · High School · Mon Jan 18 2021
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- Oceanic crust spreads at mid-ocean ridges, creating new crust and slowly enlarging the ocean basin.
- Abyssal plains are deep valleys at passive continental boundaries.
- They are likely eroded by turbidity currents, 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 volcanic arcs on continents.
- Or island arcs in the ocean.