The chemical rock formed by crystallization of excess dissolved minerals is called evaporite.

Here's why:

* Evaporation: Evaporites form when water containing dissolved minerals evaporates, leaving the minerals behind.

* Crystallization: As the water evaporates, the concentration of dissolved minerals increases. Eventually, the concentration becomes so high that the minerals start to crystallize out of the solution.

* Types of Evaporites: Common examples of evaporites include halite (rock salt), gypsum, and potash.

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