The description of all these substances found in oceans is as follows:
1. Mineral Oil: This is the most important resource found in oceans. About 40 % of the world’s mineral oil reserves are located in the sea floor. Many countries of the world are obtaining oil from seas. In India also, mineral oil is being extracted at a depth of 2000 meters at Mumbai High, 150 km. away from the coast.
2. Phosphate: Unorganized sediment deposit consisting of minerals is called Phosphate. It is usually found in the form of lumps in the oceans.
3. Manganese: Nickel and copper are obtained from its lumps, as they are obtained from land resources. It is found in the maximum amount in the Pacific Ocean. Generally, in one cubic km. of sea water, 50 tonnes of silver, 25 tonnes of gold, 11 to 35 tonnes of copper, manganese, zinc and lead, 8 tonnes of uranium, 42 tonnes of potassium sulphate, 185 tonnes of magnesium chloride and many other minerals and chemical elements are present.
