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Problems of Higher and Tethys Himalaya

Short answer

Higher Himalaya has rock fall, avalanches, GLOF, seismic hazard along MCT, and rock burst in tunnels. Tethys Himalaya faces landslides in weak shale, karst cavities, frost shattering, permafrost, and glacier hazards with intense folding.

What are the geological problems of the Higher Himalaya and Tethys Himalaya zones?

Higher Himalaya

Made of high-grade metamorphic rocks (gneiss, schist, migmatite, quartzite) and granite, with very steep, glaciated terrain.

  • Rock fall, rock avalanches and landslides on steep jointed slopes.
  • Snow avalanches, glacier retreat and GLOF; unstable moraines.
  • Rock burst, squeezing and high stress in deep tunnels.
  • Seismic hazard along the MCT.

Tethys Himalaya

Made of fossiliferous Palaeozoic-Mesozoic sedimentary rocks (limestone, shale, sandstone) in a cold, arid, high-altitude setting.

  • Landslides in weak shale and slate; rock fall in limestone.
  • Karst and cavities in limestone.
  • Frost shattering, permafrost and freeze-thaw damage.
  • Glacier, GLOF and snow avalanche hazards.
  • Intense folding and faulting; STDS zone is weak.
  • Wind erosion and debris deposition; poor accessibility.

✓ Answer checked by Claude Opus 5.5 (high effort)

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