GEOLOGY

Detailed explanation-1: -Manganese nodules are another type of hydrogenous sediment. They form marble-size to tennis ball-size lumps of iron and manganese oxide that lie scattered across the deep sea floor where sedimentation rates are particularly low.

Detailed explanation-2: -Evaporites are hydrogenous sediments that form when seawater evaporates, leaving the dissolved materials to precipitate into solids, particularly halite (salt, NaCl).

Detailed explanation-3: -Some hydrogenous sediments include halite (salt), chemical limestone and manganese nodules.

Detailed explanation-4: -Authigenic (also called Hydrogenous) sediments are deposited directly from seawater through chemical reactions. Examples are metalliferous sediments that precipitate from hydrothermal vents (black smokers) and manganese nodules in low sedimentation rate regions.

Detailed explanation-5: -Hydrogenous sediments are sediments solidified out of ocean water. As such, chemical reactions create these kinds of sediments. The precipitation of dissolved chemicals from seawater. These kinds of sediments are found commonly near hydrothermal vents.