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In sedimentary rocks, which of these is formed as a result of long periods under great heat and pressure?
A{'text': 'Bauxite', 'label': 'A'}
B{'text': 'Silver', 'label': 'B'}
C{'text': 'Uranium', 'label': 'C'}
D{'text': 'Coal', 'label': 'D'}
Answer & Solution
Correct answer: D. {'text': 'Coal', 'label': 'D'}
1. NCERT: "Coal and some forms of iron ore have been concentrated as a result of long periods under great heat and pressure" in sedimentary rocks.
2. Gypsum, potash salt and sodium salt form by evaporation in arid regions.
3. Bauxite is a residual mineral (weathering).
4. Uranium is generally found in igneous/metamorphic settings.
_Source: NCERT Class 10 Social Science (Geography), Ch 5 "Minerals and Energy Resources", §5.1_
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