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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 — the hypothesis that new oceanic crust is continuously created at mid-oceanic ridges and moves laterally away from them — was formally proposed by Harry Hess in 1962, who himself called his paper an exercise in "geopoetry" because it rested more on inference than direct proof.

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

  • From Lead-Line to Echo-Sounder: The Technological Leap
  • Mapping the Mid-Oceanic Ridge: Acoustic Bathymetry's First Breakthrough
  • Four Acoustic and Geophysical Strands of Evidence for Spreading
  • 1. Sediment Thickness (Seismic Reflection Sounding)
  • 2. Age of the Oceanic Crust
  • 3. Magnetic Striping
  • …and 2 more sections, with a conclusion

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