List of top Geology Questions

Which of the following pairs represent correct plutonic - volcanic equivalents?

Which one of the given textural features results from exsolution?

In the holosymmetric class of the Cubic System, how many more faces does the{110} form have compared to the {111 } form?

The Ripple Symmetry Index (RSI) for the given hypothetical asymmetric ripple is_____. (Round off to one decimal place)

Realgar and orpiment are both minerals of arsenic (As) and have the same chemical composition. Which one of the following properties can be used to distinguish between the two minerals in hand specimen?

Which one is the correct order of stability of the minerals (arranged from the most stable to the least stable) during chemical Weathering?

What is the minimum number of forms that an actual crystal must containin Class 1 (Pedial) of the Triclinic System?

Match the minerals in Group I with their optical properties in Group II

Group I		Group II
P	Sodalite	1	Mottled extinction
Q	Tourmaline	2	Isotropic
R	Calcite	3	Pleochroic from blue to brown
S	Muscovite	4	Twinkling effect

Which one of the given statements is correct?

A hypothetical rock contains the assemblage kyanite, sillimanite and quartz. The variance (degree of freedom) of the assemblage is_____. (In integer)

The mass of the Earth is 80 times that of the Moon while the radius of the Earth is four times that of the Moon. The surface gravity of the Earth is______times that of the Moon? (In integer)

The average unit weight of the uppermost part of the crust is 25000 N/m³. The vertical stress at a depth of 1 km would be MPa. (In integer)

Given atomic weights of Cu, Fe and S as 63.55, 55.85 and 32.10, respectively, find out the weight of copper (in gram) metal in an ore (no associated gangue) of 1kg weight constituting of bornite, chalcopyrite and chalcocite present in weight fractions of 0.4, 0.4 and 0.2, respectively.
(Round off to one decimal place)

A P-ray arrives at the mantle-core boundary at an angle 25º with respect to the normal. At what angle to the normal does it enter the core? (P-wave velocity in the lower mantle is 13.7 km/s and outer core is 8.1 km/s)(Round off to two decimal places)

A granite block starts sliding on a slope (inclination of 30° with the horizontal) under the effect of gravity only, along the true direction of inclination of the slope and hits the ground in 4 seconds. Considering zero friction and zero cohesion during sliding, the vertical height of the point (with respect to the ground) from where the block was dislodged is _____m. (g = 10 m/s²) (In integer)

Which one of the following organisms became extinct during the Cretaceous- Tertiary mass extinction event?

Match the geomorphic features in Group I with the related processes in Group II.

Group I		Group II
P	Pedicle Foramen	1	Trilobita
Q	Pallial Sinus	2	Cephalopoda
R	Pygidium	3	Pelecypoda
S	Siphuncle	4	Brachiopoda

A cylindrical soil sample is encased in an open-ended inclined tube with a diameter of 100 mm. There is a constant supply of water from the upper end of the sample and the outflow from the other end is collected in a beaker. The average amount of water collected is 1000 mm³ every 10 sec. The average outflow velocity is ________mm/sec. (π = 3.14) (Round off to three decimal places)

Increased diversity of siphonate bivalves occurred in response to

An index fossil should have

Using Airy's hypothesis, calculate the thickness of the root beneath a 4km high mountain in isostatic equilibrium with a 40km thick continental crust of density 2800kg/m³ and a mantle of density 3300kg/m³. Express your answer in km. (Round off to one decimal place)

Which of the following statements are CORRECT?

The ⁸⁷Sr/⁸⁶Sr ratio of a 1000 Ma granite was measured as 0.8001. If its ⁸⁷Rb/⁸⁶Sr ratio is 2.499, what was the Sr isotopic ratio of the source at the time of derivation of the granite? (decay constant of ⁸⁷Rb=1.39 × 10^-11 yr^-1)
(Round off to three places of decimals)

Which of the following genera are stem fossils?

The coefficients of permeability of two aquifers - 1 and 2, are 60 m/day and 40 m/day, respectively. Their saturated thicknesses are 30 m and 15 m, respectively. Assuming steady state Darcian flow, the transmissivity of aquifer 1 is ____ times that of aquifer 2. (In integer)