Oceanography



Oceanography

Compare and Contrast Phosphate and Manganese Nodules

The poly-metallic nodules, also called manganese nodules, are concretions minerals that are found on the sea bottom formed of concentric layers of iron and manganese hydroxides around one or more cores. The core of aggregation around which precipitate minerals, solidifies might also be microscopic in size and sometimes it is transformed by crystallization in ores of manganese. Phosphate nodules consist of more or less phosphatic limestone, and it also contains free nodules as a cement composition variable. Deposits are important from the point of commercially, raising its annual production to 700,000 totons. The characters ...