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Oceans

Oceans A-Z

Abyssal plain   A flat region of the ocean floor that lies about 4000–5000 metres (13,000–16,500 feet) below the ocean’s surface. It forms about 40% of the Earth’s surface.

Archipelago   A chain or cluster of islands. The five chief archipelagos are: Indonesia, Japan, Philippines, New Zealand and the British Isles.

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