Encrustation (noun)

A hard coating of mineral deposits or substances on a surface.

Origin:

From french encrustation, from latin incrustatio, from incrustare (to incrust).

Examples:

1. The encrustation on the fountain was so thick it obscured the intricate carvings.
2. The encrustation on the rock formation was composed of a variety of colorful minerals.
3. The encrustation on the ancient artifact was carefully removed by the conservators.
4. The encrustation on the ship's hull was evidence of its long voyage through treacherous waters.
5. The encrustation on the pipes was causing a blockage in the water flow.