alleryGold, silver, tin and platinum found in valley sands are:
AOcean nodules
BPlacer deposits
CVein deposits
DBed deposits
Answer & Solution
Correct answer: B. Placer deposits
1. These minerals are not corroded by water.
2. Rivers drop them in sands at valley floors.
3. Such deposits are placer deposits.
_Source: syllabus Geography, Contemporary India II, Chapter 5, Minerals and Energy Resources._
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