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Geography Optional 300+ Score Pack · Model answer

Describe the characteristics of different types of pelagic deposits.

  • UPSC 2015
  • Oceanography

Pelagic deposits are unconsolidated sediments accumulating in the open ocean, far from continental sources, formed mainly from the skeletal remains of planktonic organisms (biogenous) and fine wind-borne or precipitated inorganic material (non-biogenous) — distinct from terrigenous deposits, which are continental in origin and dominate the shelf and slope.

You are reading the opening of the model answer. The full answer is part of the Geography Optional 300+ Score Pack.

What the full answer covers

  • Terrigenous and Volcanic Deposits: The Non-Pelagic Baseline
  • Pelagic Organic (Biogenous) Deposits: The Ooze Family
  • Calcareous Ooze
  • Siliceous Ooze
  • Non-Biogenous Pelagic Deposit: Red Clay
  • The Governing Principle: Depth, Dissolution and Dilution

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