Which term describes manganese-rich rock particles found on the ocean floor?

• A. Nodule
• B. Oolite Sands
• C. Paleoceanography
• D. Pelagic Sediment

Answer: (A)

Manganese nodules are rounded concretions of manganese and iron oxides that form on the deep-ocean floor around a small nucleus, growing extremely slowly over time. This makes the term a precise description of those manganese-rich rock-like particles found on the seabed, distinguishing them from other seabed materials. Oolite sands are tiny carbonate grains formed in warm, shallow seas, not manganese-rich nodules from the deep ocean. Pelagic sediment refers to the broad group of fine materials that settle through the water column, while paleoceanography is the field studying past oceans. So the best term for these manganese-rich sea-floor particles is manganese nodules.