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oil - treasures of all kinds including answers
Approximate dimensions: 19cm x 15cm
Weight: 489 grams
Polished Crystal Egg Carving
MANGANESE NODULE (POLYMETALLIC), Pacific Ocean XMN021 Late Cretaceous oil - treasures of allManganese 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.
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