Geology and Geophysics
2025 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE GG-1 2025 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 46–48 of 65. Imported answers require review unless explicitly marked reviewed.
Question 46
Open questionGGMCQ2 marksNeeds review
What is the value of the maximum shear stress in a rock, for which the state of stress is given by the following Mohr circle?
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In a hypothetical scenario, the element Y has 4 stable isotopes
Y,
Y,
Y and
Y. The isotope
Y is radiogenic and is formed by β
decay of the isotope
X of the element X with a half-life of 3.51 billion years. An igneous rock, which has behaved as a closed system, has three different minerals P, Q, and R, which crystallized from the same magma 2 billion years ago, with initial X/Y ratios of 1.75, 2.05, and 0.75, respectively. Which one of the following statements is true for the ratio
Y/
Y in this igneous rock in the present day?Your answerChoose one option.
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Which one of the following factors governs the inclination of the slip face (leeward side) of ripples?
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