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During which of the following geological eras did birds and mammals first appear on the Earth? (-Gate geology and geophysics 2014)1 AnswerA confined sandy aquifer has a thickness of 10 m and transmissivity of 0.75 m2 per day. Its hydraulic conductivity is _____ m/day. (-Gate geology and geophysics 2014)1 AnswerMetal content (in metric tonnes) of an ore having specific gravity and assay values of 2.86 and 1.49 % respectively in a mining block 40 m long, 30 m wide and with an average thickness of 2.13 m is _______. (-Gate geology and geophysics 2014)1 AnswerDrainage patterns observed in four areas are shown in black-and-white panchromatic images P, Q, R and S. Field work in these areas has indicated presence of the following lithology/geological unit. (-Gate geology and geophysics 2014)1 AnswerThe S-wave velocity of a medium having a Poisson’s ratio and a P-wave velocity of 0.5 and 3 km/s respectively is _______km/s. (-Gate geology and geophysics 2014)1 AnswerEparchean unconformity separates geological units of GATE-Geology and Geophysics-Question-20121 Answer During its orbital motion around the Sun, the Earth is nearest to the Sun on GATE-Geology and Geophysics-Question-20121 AnswerThe correct chronological order (older to younger) of the following geological units is: (-Gate geology and geophysics)1 AnswerThe shape of the earth is best described as -gate Geology & Geophysics 20172 AnswerThe International Gravity Formula predicts the theoretical gravity value at a given point assuming a: (-Gate Geology and Geophysics)1 AnswerOut of the following gases which one has the highest contribution towards the greenhouse effect on the Earth? GATE-Geology and Geophysics-Question-20121 AnswerA geological reconnaissance survey is being carried out using remote sensing multispectral data. Which set of the two band data of the following is most appropriate for mapping limonite bearing zones? (-Gate geology and geophysics 2014)1 AnswerOn the Earth, all conditions being same, the time period of a simple pendulum will be maximum at the -gate Geology & Geophysics 20171 AnswerChoose the most appropriate word from the options given below to complete the following sentence. - Gate Geology and Geophysics 2014 (General Aptitude section)1 AnswerSelect the copper ore minerals from the following: (P) Chalcopyrite (Q) Pyrite (R) Pyrrhotite (S) Bornite (T) Sphalerite (U) Chalcocite (-Gate geology and geophysics 2014)1 AnswerThe reflection coefficient at the interface between two layers of resistivities 9 Ωm and 1 Ωm respectively is: (-Gate Geology and Geophysics 2014)1 AnswerThe convolution of two finite length sequences xn = [1, 0, -2] and yn = [1, -1] is: (-Gate geology and geophysics 2014)1 AnswerCirques are formed by: (-Gate geology and geophysics 2014)1 AnswerThe Fourier transform and integral of the Dirac delta function respectively are: (-Gate geology and geophysics 2014)1 AnswerFrom the list of planktic foraminifera below, the pair having a supplementary sutural aperture is: (-Gate geology and geophysics 2014)1 Answer