Final answer:
Hydrogenous sediments are sediments that form from the chemical precipitation of minerals from seawater. Examples of hydrogenous sediments include manganese nodules, phosphates, and halites. Stromatolites and evaporites are not examples of hydrogenous sediments.
Step-by-step explanation:
Hydrogenous sediments are sediments that form from the chemical precipitation of minerals from seawater. They are typically composed of minerals that are dissolved in the water and then precipitate out as solid particles. Examples of hydrogenous sediments include manganese nodules, phosphates, and halites. However, stromatolites and evaporites are not examples of hydrogenous sediments.