MANGANESE NODULE (POLYMETALLIC), Pacific Ocean XMN036 Saccocoma 17 cm x 11 cm

17 cm x 11 cm x 4 cm approx

Total weight: 968 grams

Shape: Teardrop

Rhodochrosite Pendant

Specimen 3: 8cm x 3cm x 3cm - 64

MANGANESE NODULE (POLYMETALLIC), Pacific Ocean XMN036 Saccocoma 17 cm x 11 cmManganese Nodule (Polymetallic) Clarion Clipperton Fracture Zone Pacific Ocean Total Weight: 0. 83 grams Approximate dimensions: 14mm x 10mm x 8mm Comes in a membrane display box. Manganese nodules are found on the deep ocean floor. The nodules are mainly composed of iron and manganese oxide, but may also contain nickel, copper and cobalt. It is estimated that the nodules grow at an extremely slow rate of only a few millimetres per million years.