Rock salt and rock gypsum are examples of sedimentary rocks.

Rock salt and rock gypsum are common examples of chemical sedimentary rocks called evaporities.

Explanation:

    Evaporities are sedimentary rocks presented in layers of saline minerals, the main ones being gypsum and halite, deposited directly from brines in areas of the sedimentation basin, notably coastal, which presents conditions of strong evaporation.

    Salt precipitation occurs when the solute reaches the salt saturation point of that component. Thus the deposition of salt layers occurs, in a sequence or sequence of progressive salinization of the deposition basin, from the less soluble to the most soluble salts; for example, gypsum and anhydrite in the lower layers, halite ("table salt", silvite, carnalite .. in the upper layers.