Question

Manganese nodules are

A. manganese salts that concentrate when seawater evaporates.
B. lumps of manganese and other metals found on the ocean floor.
C. deposits of manganese and iron deep under the ocean floor.
D. chunks of pure manganese found in deep-sea trenches.

Answer 1

Hi!

Manganese nodules are basically rocks which form out of iron and manganese hydroxides, on the sea bottom.

We specifically call this type of rock, a rock concretion.

Hopefully, this helps! =)

Answer 2

Hi! The correct answer is actually:

B. lumps of manganese and other metals found on the ocean floor.

*NOTE* a nodule is a small rounded lump of matter distinct from it's surroundings.

Happy studying! (: