List of top Questions asked in IIT JAM GG

Match the countries in Group I with the plate tectonic features in Group II that cause seismic activity in them.

Group I		Group II
P	Iceland	1	Subduction Zone
Q	Indonesia	2	Transform Fault
R	Nepal	3	Mid-Oceanic Ridge
S	New Zealand	4	Continental Collision

The figure below is an isobaric binary temperature-composition (T-X) plot. What amount (in %) of the equilibrium melting of rock R will generate a melt of composition L? (Round off to one decimal place)

Which one of the following is a geochronologic unit?

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	Cirque	1	Fluvial
Q	Ventifact	2	Glacial
R	Point bar	3	Volcanic
S	Tephra	4	Aeolian

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?

Which one of the following scismic Waves involves compression and rarefaction (but not rotation) of the material that it passes through?

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?

Buckle folds result from

Sandstone beds above a magmatic body are domal in shape, while the beds below arc horizontal. The mae,:matic bod.v is a

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

The Triassic-Jurassic boundary lies Within which one of the following stratigraphic units?

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

Match the following sedimentary rocks in Group I with their compositions in Group II

Group I		Group II
P	Packstone	1	< I5% matrix, > 25% rock fragments
Q	Cirainstone	2	> 15<½! matrix, >259t feldspar
R	Lithic arenite	3	Grain supported, contains no mud
S	Arkosic wacke	4	Grain supported, contains mud

Match the parameters in Group I with their corresponding dimensions in Group II.

Group I		Group II
P	Shear modulus	1	\(M^\circ L^\circ T^\circ\)
Q	Hydraulic conductivity	2	\(M^1L^{-3}T^\circ\)
R	Volumetric strain	3	\(M^0 L^1 T^{-1}\)
S	Dry density	4	\(M^1 L^{-1} T^{-2}\)

Which one of the magnitude scales given below DOES NOT saturate while estimating size of carthquakes?

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

A horizontal upright fold will have a

The displacement of the bed shown in the figure bellow is caused by a single movement along fault XYZ. Of the options given below, which fault-type can explain the observed displacement?

In the AFM diagram below, W, X, Y and Z sepresent four pelitic assemblages. Which combinations of assemblages contain the same mineral phases in equilibrium in the staurolite zone?

Match the rock types in Group I with their characteristic mineral assemblages in Group II.

Group I		Group II
P	Diorite	1	plagioclase-orthopyroxene clinopyroxene
Q	Tole	2	olivine-orthopyroxene-clinopyroxene
R	Norite	3	plagioclase-homblonde + quartz
S	Lherzolite	4	quarte-plagioclase K-feldspar

Match the mineral deposit types in Group I with the water types in Group II considered dominantly responsible for their origin.

Group I		Group II
P	Porphyry copper deposits	1	Meteoric water
Q	Mississippi Valley Type deposits	2	Groundwater
R	Roll-front uranium deposits	3	Magmatic water
S	Epithermal gold deposits	4	Connate water

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

The contact between the Talchir Formation and the underlying Precambrian basement is