Which sediment type forms from the evaporation of seawater and precipitation of minerals such as halite?

Which sediment type forms from the evaporation of seawater and precipitation of minerals such as halite?

• A. Hydrogenous Sediment
• B. Neritic Sediment
• C. Mineral
• D. Evaporite

Answer: (D)

Evaporites are chemical sediments formed when seawater in a restricted basin dries out and the dissolved salts reach saturation, precipitating as solids like halite (rock salt) and gypsum. This evaporation-driven precipitation is the defining feature, so the sediment category is evaporite. Hydrogenous sediments include various minerals that precipitate from seawater, but they aren’t tied specifically to evaporation-driven concentration; neritic sediments originate from land-derived material deposited near shore; and “mineral” isn’t a recognized sediment type. Therefore, the process described—evaporation of seawater with halite precipitation—best fits evaporite.

Evaporites are chemical sediments formed when seawater in a restricted basin dries out and the dissolved salts reach saturation, precipitating as solids like halite (rock salt) and gypsum. This evaporation-driven precipitation is the defining feature, so the sediment category is evaporite. Hydrogenous sediments include various minerals that precipitate from seawater, but they aren’t tied specifically to evaporation-driven concentration; neritic sediments originate from land-derived material deposited near shore; and “mineral” isn’t a recognized sediment type. Therefore, the process described—evaporation of seawater with halite precipitation—best fits evaporite.