List of top Geology Questions asked in IIT JAM GG

Identify the type of fault in the given figure. 

Match the primary sedimentary structure in Group I with the corresponding process of formation in Group II. 
\[\begin{array}{|l|l|} \hline \textbf{Group I} & \textbf{Group II} \\ \hline \text{P. Asymmetric ripples} & \text{1. Water escape} \\ \hline \text{Q. Dish and pillar} & \text{2. Bed load transportation of sediments} \\ \hline \text{R. Flute cast} & \text{3. Deposition from alternate traction and suspension load} \\ \hline \text{S. Wavy bedding} & \text{4. Scouring by turbulent eddy} \\ \hline \end{array}\]

Match the mineral/metal deposit in Group I with the corresponding Indian occurrence in Group II. 
\[\begin{array}{|l|l|} \hline \textbf{Group I} & \textbf{Group II} \\ \hline \text{P. Diamond} & \text{1. Malanjkhand} \\ \hline \text{Q. Iron} & \text{2. Wajarkaru} \\ \hline \text{R. Fluorite} & \text{3. Dalli Rajhara} \\ \hline \text{S. Copper} & \text{4. Ambadongar} \\ \hline \end{array}\]

Match the name of granitoid in Group I with the corresponding Craton in Group II. 
\[\begin{array}{|l|l|} \hline \textbf{Group I} & \textbf{Group II} \\ \hline \text{P. Closepet} & \text{1. Singhbum} \\ \hline \text{Q. Berach} & \text{2. Bastar} \\ \hline \text{R. Dongargarh} & \text{3. Dharwar} \\ \hline \text{S. Mayurbhanj} & \text{4. Aravalli} \\ \hline \end{array}\]

A northerly dipping fault (F-F) has displaced beds P, Q and R. The thickness of the beds across the fault is same. Identify the fault type(s). 

A bedding plane, pictorially represented at X, will be plotted in stereonet as 

A schematic deformation (D)-metamorphism (M)-time map of a metamorphic belt is shown below. The belt recorded two phases of deformation, D₁-D₂ and attendant schistosity, S₁-S₂ and metamorphism, M₁-M₂. The metamorphic minerals stable during these events are shown by solid lines. On the basis of this information, which of the following statement(s) is/are correct? 

The general formula of an amphibole mineral is A₀₋₁B₂C₅T₃O₂₂(OH)₂, where A, B, C, and T are cationic sites with different co-ordination numbers as stated below: A=12, B=6-8, C=6, T=4. The amount of octahedral Al in an amphibole of composition Na₀.₆Ca₂Mg_3.8Al₃Si₆O₂₂(OH)₂ is ...... 
 

In the block diagram, the net slip (=100 m) is resolved into strike slip (s) and dip slip (d) components. The value (in m, correct to two decimal places) of "s" is ..... 

The true thickness (t, in m) of bed B in the given diagram is ..... 

In an undeformed and normal stratigraphic succession, a dolerite dyke was emplaced before deposition of sandstone B. The difference between the maximum ages (in Myr) of deposition of sandstone A and sandstone B is ...............