MANGANESE NODULE (POLYMETALLIC), Pacific Ocean XMN021 Late Cretaceous the rocks are wet in

the rocks are wet in the first

Metal (gold) coated quartz

Weight: 489 grams

Approximate dimensions: 19cm x 15cm

Approximate dimensions: 41mm x 17mm x 12mm

MANGANESE NODULE (POLYMETALLIC), Pacific Ocean XMN021 Late Cretaceous the rocks are wet inManganese Nodule (Polymetallic) Clarion Clipperton fracture zone Pacific Ocean Total Weight: 3. 58 grams Approximate dimensions: 20mm x 16mm x 15mm 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.