NET, IAS, State-SET (KSET, WBSET, MPSET, etc.), GATE, CUET, Olympiads etc.: Oceanography Deposits

Get unlimited access to the best preparation resource for competitive exams : get questions, notes, tests, video lectures and more- for all subjects of your exam.

Get video tutorials on geography @ YouTube Examrace Channel

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
    1. Peteropod Ooze: has 80% of CaCo3, found in tropical oceans, especially Canary island, entails mid Mediterranean ridge;
    2. 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.
  6. 6. Red Clay: has silicates of alumina in abundance (85.35%) and oxides of iron, calcium.

Manishika