Gl101 EXAM PREP 2026/2027 WITH ACTUAL
CORRECT QUESTIONS AND VERIFIED
DETAILED ANSWERS |CURRENTLY TESTING
QUESTIONS AND SOLUTIONS|ALREADY
GRADED A+|NEWEST |JUST
RELEASED!!|GUARANTEED PASS
How do unconsolidated sediments originate?
A) by spontaneous decomposition in place of underlying rocks
B) by weathering, erosion, transport, and deposition
C) from the rock cycle by interrupted transmission
D) from meteorite showers breaking up rocks
B
Which characteristic is absolutely necessary for a sedimentary rock to have potential as a
possible reservoir rock for oil or gas?
A) high porosity
B) clastic texture
C) chemical origin
D) good stratification
A
What percentage of the Earth's crust is composed of sedimentary rocks?
A) 5%
B) 15%
C) 25%
D) 75%
A
1|Page
,Which type of sediment undergoes the most compaction as it lithifies to sedimentary rocks?
A) marine mud
B) desert dune sand
C) reef limestone
D) coarse gravel
A
What are the most common cementing agents in sedimentary rocks?
A) CaO
B) Ca(OH)2
C) calcite, silica, and iron oxides
D) clays and bitumen
C
Which common mineral of igneous rocks is the most abundant mineral in detrital sedimentary
rocks?
A) calcite
B) orthoclase
C) quartz
D) biotite
C
________ cement produces dark red and orange colours in some sandstone.
A) Clay
B) Calcite
C) Quartz
D) Iron oxide
D
2|Page
,Assume that water filling a crack in a rock undergoes cycles of freezing and melting. Which of
the following statements is true?
A) Water expands as it melts, causing the crack walls to be pushed apart.
B) Water shrinks as it freezes, causing the crack walls to be drawn closer together.
C) Water expands as it freezes, causing the crack walls to be pushed apart.
D) Water shrinks as it melts, causing the crack walls to be pulled closer together.
C
Which of the following is/are most susceptible to chemical weathering by dissolution?
A) quartz
B) clay minerals
C) iron oxides
D) calcite
D
In which of the following climates would rates of chemical weathering generally be highest?
A) warm and moist
B) cold and dry
C) warm and dry
D) cold and moist
A
Which of the following affects both the kind of soil and its rate of formation?
A) type of vegetation cover
B) meteorite showers
C) sun spot activity
D) plants and animals, climate, and parent material
D
3|Page
, Which type of sand depositional environment would probably have the best degree of sorting?
A) beach face
B) dune
C) river bar
D) delta face
B
What does the degree of rounding indicate in a sediment?
A) the distance travelled or duration of time involved in sediment transport
B) where the minerals originally came from
C) the velocity of transport
D) whether the sediment was deposited in a stream or the ocean
A
Which of the following rocks is lithified from sediment that was deposited in deep water and
was essentially unmodified by post-depositional current action?
A) cross-bedded dune sandstone
B) wacke with graded bedding
C) well-sorted, quartz sandstone
D) reddish mudstone with mud cracks
B
What kind of rock are most dripstones and stalactites in caves?
A) chert
B) gypsum
C) limestone
D) opal
C
4|Page
CORRECT QUESTIONS AND VERIFIED
DETAILED ANSWERS |CURRENTLY TESTING
QUESTIONS AND SOLUTIONS|ALREADY
GRADED A+|NEWEST |JUST
RELEASED!!|GUARANTEED PASS
How do unconsolidated sediments originate?
A) by spontaneous decomposition in place of underlying rocks
B) by weathering, erosion, transport, and deposition
C) from the rock cycle by interrupted transmission
D) from meteorite showers breaking up rocks
B
Which characteristic is absolutely necessary for a sedimentary rock to have potential as a
possible reservoir rock for oil or gas?
A) high porosity
B) clastic texture
C) chemical origin
D) good stratification
A
What percentage of the Earth's crust is composed of sedimentary rocks?
A) 5%
B) 15%
C) 25%
D) 75%
A
1|Page
,Which type of sediment undergoes the most compaction as it lithifies to sedimentary rocks?
A) marine mud
B) desert dune sand
C) reef limestone
D) coarse gravel
A
What are the most common cementing agents in sedimentary rocks?
A) CaO
B) Ca(OH)2
C) calcite, silica, and iron oxides
D) clays and bitumen
C
Which common mineral of igneous rocks is the most abundant mineral in detrital sedimentary
rocks?
A) calcite
B) orthoclase
C) quartz
D) biotite
C
________ cement produces dark red and orange colours in some sandstone.
A) Clay
B) Calcite
C) Quartz
D) Iron oxide
D
2|Page
,Assume that water filling a crack in a rock undergoes cycles of freezing and melting. Which of
the following statements is true?
A) Water expands as it melts, causing the crack walls to be pushed apart.
B) Water shrinks as it freezes, causing the crack walls to be drawn closer together.
C) Water expands as it freezes, causing the crack walls to be pushed apart.
D) Water shrinks as it melts, causing the crack walls to be pulled closer together.
C
Which of the following is/are most susceptible to chemical weathering by dissolution?
A) quartz
B) clay minerals
C) iron oxides
D) calcite
D
In which of the following climates would rates of chemical weathering generally be highest?
A) warm and moist
B) cold and dry
C) warm and dry
D) cold and moist
A
Which of the following affects both the kind of soil and its rate of formation?
A) type of vegetation cover
B) meteorite showers
C) sun spot activity
D) plants and animals, climate, and parent material
D
3|Page
, Which type of sand depositional environment would probably have the best degree of sorting?
A) beach face
B) dune
C) river bar
D) delta face
B
What does the degree of rounding indicate in a sediment?
A) the distance travelled or duration of time involved in sediment transport
B) where the minerals originally came from
C) the velocity of transport
D) whether the sediment was deposited in a stream or the ocean
A
Which of the following rocks is lithified from sediment that was deposited in deep water and
was essentially unmodified by post-depositional current action?
A) cross-bedded dune sandstone
B) wacke with graded bedding
C) well-sorted, quartz sandstone
D) reddish mudstone with mud cracks
B
What kind of rock are most dripstones and stalactites in caves?
A) chert
B) gypsum
C) limestone
D) opal
C
4|Page
