Geology and Geophysics
2024 · Paper 1
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Complete GATE GG-1 2024 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 64–65 of 65. Imported answers require review unless explicitly marked reviewed.
Question 64
Open questionGGNAT2 marksNeeds review
If the Rb-Sr isochron formed by a suite of gabbro samples has a slope of 0.0265, then the calculated age of the gabbro in million years is ________ (in integer).
[Use λ(⁸⁷Rb) = 1.42 × 10⁻¹¹ year⁻¹]
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Open questionGGNAT2 marksNeeds review
A soil mass comprises two horizontal layers (of equal thickness and equal width) stacked one above the other. The hydraulic conductivities of the two layers are 5 × 10⁻² cm/s and 3 × 10⁻² cm/s. Considering Darcian flow of water and same hydraulic gradient for both the layers, the effective hydraulic conductivity of the soil mass in cm/s is __________ (rounded off to two decimal places).
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