How are marine deposits formed?

Any deposit of insoluble material, primarily rock and soil particles, transported from land areas to the ocean by wind, ice, and rivers, as well as the remains of marine organisms, products of submarine volcanism, chemical precipitates from seawater, materials from outer space (meteorites) etc., accumulate on the seafloor and form marine deposits.

Further Reading:

• Ocean Floor And Its Features
• Minor Relief of the Ocean floor