Competitive Exams: Oceanography Deposits

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Ocean Deposits

Oceanic Deposits

  1. Gravels: its diameter 2 mm-256 mm; are sediments and are deposited near the coast on the 256 mm. (diameter), cobbles-64 mm., pebbles - 4 mm., granules - 2 mm.

  2. Blue Mud: materials derived through the disintegration of rocks rich in Iron sulphide. It is especially found in Atlantic ocean, Mediterranean sea and Arctic sea and has 35% of calcium carbonate

  3. Red Mud: rocks rich in Iron oxides, contains 32% of calcium carbonate and found at Yellow sea, Brazilian Coast

  4. Green Mud: contains green silicates of potassium (K) and Glauconite (form of iron) and contains 0-56% of CaCo3 and found mainly in Japanese, Australian and African coasts, at the depth of 100-900 fathoms.

  5. Calcareous Oozes: contains lime and generally found is of two kinds

  6. Peteropod Ooze: has 80% of CaCo3, found in tropical oceans, especially Canary island, entails mid Mediterranean ridge;

  7. Globigerina Ooze: 64.46 Ca, 1.64% silica, found in tropical and temperate zones of Atlantic ocean between the depth of 2,000-4,000 fathoms.

  8. 6.Red Clay: has silicates of alumina in abundance (85. 35%) and oxides of iron, calcium.