Question
Assertion (A):
Granite has larger crystals than basalt.
Reason (R):
Basalt has larger content of metallic minerals.
Granite has larger crystals than basalt.
Reason (R):
Basalt has larger content of metallic minerals.
Answer: Option D
Answer: (d)
The crystal size in the igneous rocks is more a function of the quickness of the process of cooling rather than of the mineral content.
The mineral content determines the melting point of the rocks and the basaltic lava having a higher content of metallic minerals solidifies rapidly once it reaches the surface.
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Answer: (d)
The crystal size in the igneous rocks is more a function of the quickness of the process of cooling rather than of the mineral content.
The mineral content determines the melting point of the rocks and the basaltic lava having a higher content of metallic minerals solidifies rapidly once it reaches the surface.
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