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Crossword Puzzle Oceanography

Across
Long underwater depression
A raised wedge at the base of a continental slope
The zone that separates thin and thick oceanic crust
A large, flat area of an ocean basin
Underwater landmass that extends from a continent.
Down
Submerged volcanic mountains
The most prominent feature of ocean ridges, form underwater mountain ranges
Flat-topped submerged sea mounts
Steep slope at the edge of a continental shelf
Deep, v-shaped valleys