Ferromanganese nodules

Ferromanganese nodules, often referred to simply as manganese nodules, are geological formations that consist primarily of manganese and iron, along with various trace metals and minerals. They typically form on the ocean floor, particularly in the deep sea, and are known for their rounded, nodule-like shape, which can range in size from a few millimeters to several centimeters in diameter. ### Composition and Formation 1.