- 2072 Chaitra · 2 marks
Dun valley and midland lithology and altitude
Short answer
Dun valleys: 200-700 m altitude; unconsolidated alluvial and fluvial gravel, sand, silt, clay, colluvium. Midland: 800-2500 m (ridges to 3000 m); phyllite, slate, schist, quartzite, limestone, dolomite, gneiss, granite with lacustrine/fluvial basin sediments.
Describe the lithology and altitude range of the Dun valley and midland.
| Zone | Altitude | Lithology |
|---|---|---|
| Dun valleys | About 200-700 m | Unconsolidated alluvial and fluvial gravel, sand, silt and clay, with colluvium from the surrounding hills |
| Midland | About 800-2500 m (up to 3000 m on the ridges) | Phyllite, slate, schist, quartzite, limestone, dolomite, gneiss and granite; basins with lacustrine and fluvial sediments |
✓ Answer checked by Claude Opus 5.5 (high effort)
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