Which of the following statement(s) is/are false?
(i) Igneous rocks are formed from the solidification of molten magma.
(ii) They can form either beneath the earth’s surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks
- Only (i)
- Only (ii)
- Both (i) and (ii)
- Neither (i) nor (ii)
If the rocks have to be arranged as per their comprehensive strength, which is the correct sequence?
- Igneous rocks > Metamorphic rocks > Sedimentary rocks
- Igneous rocks > Sedimentary rocks > Metamorphic rocks
- Metamorphic rocks > Sedimentary rocks > Igneous rocks
- Sedimentary rocks > Metamorphic rocks > Igneous rocks
Asthenosphere is the
- plastic layer of the mantle
- layer beneath the mesosphere
- topmost layer of hydrosphere
- bottommost layer of the mantle
Rocks behave as _______________ masses towards operating stresses.
- Inelastic
- Elastic
- Isotropic
- Anisotropic
Which of the following statements are true?
i. Adike is formed when the magma moves vertically through the fissures, cutting through various rock layers.
ii. Magma, when it moves in a horizontal fashion along a bed of older rocks through fissures and cracks, is referred to as a sill.
- Only (i)
- Only (ii)
- Both (i) and (ii)
- Neither (i) nor (ii)
Granite is an example of which type of rocks?
- Intrusive igneous rock
- Extrusive igneous rock
- Sedimentary rock
- Metamorphic rock
The maximum acceleration which is experienced by the ground during shaking is known as
- Shaking acceleration
- Peak ground acceleration
- Radar acceleration
- Sky acceleration
Which type of geological structure can be rectified by grouting?
- Joints
- Folds
- Faults
- Inclined strata
The rocks which exhibit mixed characteristics of volcanic and plutonic rocks are ________________
- Intermediate rocks
- Mixed rocks
- Hypabyssal rocks
- Secondary rocks
In ‘mafic’ type of igneous rocks, the percentage of silica is
- < 45%
- 45 – 55%
- 55 – 60%
- 60 – 70%
Which of the following statements are valid for Tectonic plates
1. Include the crust and the uppermost mantle
2. Are the outermost shell of the solid earth 3. Are a rigid, solid layer about 100 km thick
- Only 1
- 1 and 2
- 2 and 3
- 1, 2 and 3
Lustre doesn’t depend on
- Refractive index mineral
- Absorption of mineral
- Transmittance of mineral
- Nature of reflecting surface
The dam would become irrelevant if
- the rocks become strong
- the rocks become impermeable
- the rocks become porous
- the rocks start weathering to a certain extent.
The Igneous rocks are formed by
- The cooling and consolidation of molten rock material
- The deposition of product of rock weathering
- The change in characters of pre-existing rocks by the action of heat and pressure
- All of the above
In a geological study, the angle between the line in an inclined plane and the horizontal in a vertical plane is called as
- Rake
- Strike
- Plunge
- Pitch
Rocks formed due to alteration of original structure under heat and excessive pressure are
- sedimentary rocks
- igneous rocks
- metamorphic rocks
- none of the above
The igneous rock rich in cavities is
- Granitea
- Basalt
- Gabbro
- Dolomite
Which of the following processes is the removal of fine-grained particles such as silt and clay from the Earth’s surface by wind?
- Deflation
- Desilting
- Erosion
- Abrasion
In geological features, the folds bending upwards are known as
- dike
- thermocline
- syncline
- anticline
Rocks formed due to alteration of original structure under heat and excessive pressure are
- Sedimentary rocks
- Igneous rocks
- Metamorphic rocks
- None of the above
