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GATE GG-1 · 2026 · GG

Question 46: Igneous petrology

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Question 46

GGMCQ2 marksNeeds review
The given table shows modal volume percentage of quartz, alkali feldspar and plagioclase in coarse-grained rocks, X and Y. Which of the following rock names of X and Y are CORRECT according to the IUGS classification?
Mineral
X (volume %)
Y (volume %)
Quartz
15
25
Plagioclase
20
60
Alkali feldspar
65
15
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2026GG

GATE GG-1 2026 · Paper 1

Geology and Geophysics · Original paper archive

Section
Section GG
Question type
Multiple choice (MCQ)
Marks
2 marks
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