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Geography Optional 300+ Score Pack · Model answer

“Offshore Acoustic Study helped the development of the concept of sea floor spreading.” Explain.

  • UPSC 2013
  • Oceanography

Seafloor spreading — new oceanic crust forms at mid-oceanic ridges, moves away on both sides and is consumed at trenches — was proposed by Harry Hammond Hess (1962), with Robert S. Dietz coining the term in 1961. “I shall consider this paper an essay in geopoetry.” — Harry Hammond Hess

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

  • The Acoustic Method
  • Evidence 1 — The Mid-Oceanic Ridge and its Rift Valley
  • Evidence 2 — Guyots and Trenches
  • Evidence 3 — Seismic Reflection and Refraction
  • Evidence 4 — Acoustic Surveys as the Platform for Magnetic Proof
  • From Hypothesis to Theory — and the Limits of Acoustics

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