List of top Geology Questions

Identify the rocks P and Q in the diagram as per the IUGS classification. 

Match the mineral deposits in Group I with corresponding Indian occurrences in Group II.
Group I
P. Iron
Q. Uranium
R. Manganese
S. Baryte
Group II
1. Mangampet, Andhra Pradesh
2. Balaghat, Madhya Pradesh
3. Narwa Pahar, Jharkhand
4. Hospet, Karnataka
Match the plutonic rocks in Group I with corresponding volcanic equivalents in Group II.
Group I
P. Granite
Q. Syenite
R. Diorite
S. Gabbro
Group II
1. Andesite
2. Basalt
3. Rhyolite
4. Trachyte
Match the morphological features/life processes in Group I with corresponding organisms in Group II.
Group I
P. Water vascular system
Q. Molting
R. Jet propulsion locomotion
S. Lophophore
Group II
1. Cephalopoda
2. Echinodermata
3. Brachiopoda
4. Trilobita
Which of the following change(s) when a dipping bed with a plunging lineation is rotated about a vertical axis?
Which of the following indicate(s) the presence of directed stress in a rock?
The correct combination(s) of ranks and corresponding categories of stratigraphic units is/are
The correct order(s) of stability of silica polymorphs with increasing pressure is/are

Which of the following statement(s) is/are correct for the upper hemisphere stereographic projection of a crystal given below? 

Which of the following statement(s) is/are correct?
Hermatypic corals are typically found in
Choose the characteristic mineral(s) formed in the supergene enriched zone of a sulphide deposit.
Which of the following is/are true for crystallization of plagioclase phenocrysts from a basic magma forming a layered intrusion?
The absolute difference in the Moh's hardness values of the two silicates among the minerals listed below is ...............
Apatite, Corundum, Gypsum, Talc, Topaz

Attitudes of beds in sequences A (younger) and B (older), separated by an unconformity UU, are given in the following sectional view. If UU was horizontal when sequence A was deposited, the dip amount of beds in sequence B at that time was ...... (answer in one decimal place). 

 

Attitudes of the two limbs of a non-plunging kink fold shown below are 045°, 20°SE and 045°, 40°NW. The dip amount (in degrees) of the axial plane of the kink fold is ............ (answer in one decimal place). 

 

In the garnet formula \( \text{(Fe}_{2.5}\text{Mg}_{0.3}\text{Ca}_x\text{)}\text{Al}_2\text{Si}_3\text{O}_{12} \), x represents the number of atoms of Ca. The mole % of grossular in the garnet is ........... (answer in one decimal place).
 

Based on 8 oxygen atoms, the number of silicon atoms in a plagioclase of composition \( \text{Ab}_{20}\text{An}_{80} \) is .......... (answer in one decimal place). 
 

The true thickness of Bed A in the map given below is ......... m (answer in one decimal place). 

 

A melt containing 900 moles of anorthite and 100 moles of diopside undergoes crystallization. The number of moles of anorthite that crystallize as the melt composition moves from P to Q is .......... 

 

Dashed lines in the figures given below represent joints. Considering only the orientations of the joints and the slope face, which one of the following represents the most stable slope? 

Identify the correct morphological features corresponding to numbers I – IV in the echinoid illustrated below: 

Which one of the following minerals has isolated (SiO$_4$)$^{4-}$ tetrahedra linked by divalent cations in octahedral coordination?
 

Assuming the Earth to be an ideal sphere, the volume % of the core relative to the total volume of the Earth is .......... (answer in one decimal place).
When a dunite comprising pure forsterite undergoes melting, the weight % of MgO in the melt is ........ (answer in one decimal place). Given molecular weights of \( \text{SiO}_2 = 60.08 \), \( \text{MgO} = 40.30 \).