Practice question

MCQ

Question

Rusticles or 'rivers of rust' are structures that run down the sides of the sunken ships. They are formed by the action of:

Options

Choose one · Correct answer highlighted

Bacteria feeding off the iron Correct Sharks gnawing at the metal Small fish eating the iron Flows of water currents

Explanation

Rusticles are icicle-shaped rust formations created by iron-oxidizing bacteria like Halomonas titanicae forming biofilms that metabolize iron from ship hulls, producing hydrated ferric oxides that stream downwards as fragile rust rivers.

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