What weight percentage of silica (SiO2) typifies granites and rhyolites?
A) 90%
B) 50%
C) 30%
D) 70%
Correct Answer:
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Q39: Intermediate rocks like andesite and diorite _.
A)
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Q41: Mafic rocks like basalt and gabbro_ .
A)
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A) komatiite
B)
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A) when crystallization
Q49: What is the rock colour (total %
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