Free online PETROLOGY Quiz
Geology Solved Test
Q.1: The sedimentary rock without stratification is:
(a) Shale.
(b) Limestone.
(C) Sandstone.
(d) Tillie.
ANSWER: (d)
Q.2: Load cast structures in sedimentary rocks can be regarded as:
(a) Exogenesis.
(b) lndogenetic.
(c) Biogenic.
(d) None of these.
ANSWER: (b)
Q.3: Antidotes are formed:
(a) At the lowest velocities of the current flow.
(b) At the highest velocities of the current flow.
(c) At the moderate velocities of the current flow.
(d) When there is no flow.
ANSWER: (b)
Q.4: Aeolian and alluvial ripple marks can be distinguished by the following characteristics
(a) At the crest of aeolian ripples, coarse particles are found, while at the crest of alluvial ripples fine
Particles are formed
(b) At the crest of aeolian ripples, fine particles are found, while at the crest of alluvial ripples,
Coarse particles are found
(c) In both the case crests are made up of fine particles; while the troughs are made up of different
Particle sizes.
(d) In both the case crests are made up of coarse particles, while the troughs are made up of
different particle sizes.
ANSWER: (a)
Q.5: Climbing ripples are characteristics of:
(a) Point bar.
(b) Braided bar.
(c) Both (a) and (b).
(d) None of these.
ANSWER: (c)
Q.6: The thickest cross beddings are most often found in:
(a) Alluvial deposits.
(b) Aeolian deposits.
(c) Glacial deposits.
(d) Lake deposits.
ANSWER: (b)
Q.7: Ripple marks are best observed in:
(a) Limestones.
(b) Shams.
(c) Conglomerated.
(d) Sandstones.
ANSWER: (d)
Q.8: Current beddings are formed due to:
(a) Frequent changes in velocity of the flow of the stream.
(b) Frequent change in direction 'of the flow of the stream.
(c) Frequent changes in velocity and direction of the flow of the stream.
(d) None of these.
ANSWER: (c)
Q.9: Graded bedding is characterised by:
(a) Coarse grains at bottom and fine grains at top
(b) Coarse grain at top and fine grains at bottom.
(c) Same grain size distribution.
(d) Mixture of coarse and fine grains.
ANSWER: (a)
Q.10: The larger the scale of the cross beds indicate:
(a) The higher the velocity of the current.
(b) The lower the velocity of the current.
(c) The distance of the source rock.
(d) None of these.
ANSWER: (a)
Q.11: Variation of palaeocurrent direction is minimum ln the deposits formed by:
(a) Glacial processes.
(b) Fluvial processes.
(c) Aeolian processes.
(d) Beach processes.
ANSWER. (d)
Q.12: A thickness map which shoes drilled intervals, irrespective of the amount of dip, is
called:
(a) ISOpach map.
(b) ISOchore map.
(c) lSObar map.
(d) lSOlith map.
ANSWER. (b)
Q.13: Grain size distribution of particles can be graphically represented by:
(a) Histogram.
(b) Cumulative curve.
(c) Triangular diagram.
(d) All the above.
ANSWER. (d)
Q.14: The liquid, used to separate heavy minerals from light minerals is:
(a) Chloroform.
(b) Broomcorn.
(C) Kerosene.
(d) Ethylene.
ANSWER. (b)
Q.15: Presence of augite minerals in a sedimentary rock will indicate:
(a) High grade metamorphic source.
(b) Low grade metamorphic source.
(c) Sandstone rock source.
(d) Igneous volcanic source.
ANSWER. (d)
Q.16: Differentiation between conglomerate and breccias is generally, made based on the
(a) Mineral composition.
(b) Sediments size.
(c) Sediments shape.
(d) Cementing materials.
ANSWER. (c)
Q.17: Quartz sandstone is said "mature" when it is having:
(a) Well-rounded, poor-sorted quartz grains.
(b) Poor-rounded, poor-sorted quartz grains.
(c) Well-rounded, well-sorted quartz grains.
(d) Poor-rounded, well-sorted quartz grains.
ANSWER. (c)
Q.18: ll a body of seawater is totally evaporated, what sequence of rock types result
(a) Calcite, Gypsum, Anhydrite and Halite.
(b) Gypsum, Calcite, Halite and Anhydrite.
(c) Halite, Gypsum, Anhydrite and Calcite.
(d) Gypsum, "Anhydrite, Halite and Calcite.
ANSWER. (a)
Q.19: Chalk is composed of carbonate mud and microfossils. It lt contains clay minerals as
well it, is called :
(a) Chert.
(b) Clayey chalk.
(c) Ooze.
(d) Marl.
ANSWER. (d)
Q.20: The high detritus, quartz percentage in a sand stone indicates:
(a) A recycled origin from a deeply weathered quartz-rich terrain.
(b) Highly resistive nature of the quartz grain.
(c) Long distance of transportation.
(d) None of these.
ANSWER. (a)
Q.21: Sandstone of glacial origin contains a good percentage of feldspar grains, because:
(a) It is abundant glacial regions.
(b) Its hardness increases in cold regions.
(c) The prevailing intense cold climate prevents feldspar’s decay
(d) None of these.
ANSWER. (c)
Q.22: Greywacke is dark in colour andirlch in clay rock fragments and contains less of
Quartz sand grains, which are:
(a) Rounded, fine and well sorted.
(b) Angular, fine and well sorted.
(c) Rounded, coarse and unsorted
(d) Angular, coarse and unsorted.
ANSWER. (d)
Q.23: Who is the given credit for the principle of uniformitarianism (the present is the key to
past):
(a) Alfred Wegener.
(b) Sir James Hutton.
(c) F. Jenkins.
(d) Arthur Holmes.
ANSWER. (b)
Q.24: Aragonite is unstable under normal temperature pressure conditions, which ions help
preserve aragonite much longer than normal:
(a) Calcite ions
(b) Sulphate ions
(c) Ferric ions.
(d) None of these
ANSWER. (b)
Q.25: ln phosphatic minerals, the main phosphate is usually called:
(a) Collophanite.
(b) Ankerite
(c) Dolomite.
(d) Sparite.
ANSWER. (a)
Sir plz explain ans of questn no. 11
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