No. It is a type of Hydrogenous sediment.
manganese nodules
salt precipitating out of the seawater
Undisturbed seafloor sediments will carry a history of what has transpired there, much like glacial ice or peat bogs. Some interesting and potentially valuable mineral deposits are also found on the seafloor, eg. manganese nodules, metals from black smokers, and of course, deep in the rock, oil.
A small, rounded lump of a mineral or mixture of minerals that is distinct from and usually harder than the surrounding rock or sediment. Nodules often form by replacement of a small part of the rocks in which they form.
iron, copper, nickel, or cobalt
manganese nodules
manganese nodules
salt precipitating out of the seawater
Manganese nodules contain manganese, iron and nickel.
because
Manganese nodules do not accumulate below 4500 meters depth because the manganese minerals are highly soluble in seawater below that depth.
Phosphates and manganese
Manganese Nodules.
Manganese Nodules.
HMS Challenger
oxides of manganese, nickel, copper and iron
none yet, but we need to start