61
Silt and clay deposits formed by the sediments carried in suspension by air currents is known as
1
marlite
2
novaculite
3
loess
4
lacustrine
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62
Find the argillaceous rock from the following :
1
Sandstone
2
Siltstone
3
Shale
4
Grit
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63
Find out the discordant bedding of the following :
1
Current bedding
2
Graded bedding
3
Ripple marks
4
Mud cracks
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64
Rounded clasts, high Si02 and Al203,high ZTR reflect
1
high maturity
2
low maturity
3
tectonic unstability
4
reducing conditions
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65
Blastoporphyritic means
1
an inherited porphyritic fabric
2
equigranular fabric
3
a fabric that develops during metamorphism
4
post-metamorphic fabric
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Answer: an inherited porphyritic fabric
66
Hornfelsic rocks form due to metamorphism.
1
regional
2
contact
3
cataclastic
4
pneumatolytic
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67
Which of the following rocks was produced by dynamothermal metamorphism?
1
Schist
2
Marble
3
Mylonite
4
Slate
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68
The general temperature of metamorphism is in between
1
400 °C to 1100 °C
2
500 °C to 1200 °C
3
100 °C to 3000 °C
4
200 °C to 800 °C
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69
Regional metamorphism occurred due to conditions.
1
heat predominant
2
directed pressure predominant
3
uniform pressure and heat predominant
4
directed pressure and heat predominant
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Answer: directed pressure and heat predominant
70
The minerals glaucophane and jadeite are suggestive of
1
high temperature-low pressure
2
high pressure-low temperature
3
high temperature-high pressure
4
low pressure-low temperature
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Answer: high pressure-low temperature
71
Find the hydro thermal deposit from the following :
1
Residual deposit
2
Placer deposit
3
Cavity-filling deposit
4
Evaporites
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Answer: Cavity-filling deposit
72
Pyrolusite is an ore of
1
manganese
2
aluminium
3
iron
4
copper
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73
The zone of oxidation in the supergene sulphide enrichment process extends
1
up to the water table
2
up to 2-5 metres above water table
3
just below water table
4
up to the soil level
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Answer: up to the water table
74
Ladder views are usually found in
1
sill
2
dyke
3
lava flows
4
volcanic pipes
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75
Which one of the following is not a magmatic concentration deposit?
1
Residual liquid deposit
2
Immiscible liquid deposit
3
Oxidized and supergene deposit
4
Pegmatitic deposit
View Answer
Answer: Oxidized and supergene deposit
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