Gujarat Police Constable Exam Geography Questions

11. Mushroom Rocks are the typical land forms seen in
(1) River Valleys
(2) Mountain tops
(3) Coastal areas
(4) Deserts
(SSC CPO Sub-Inspector
Exam. 05.09.2004)
12. Basaltic lava is found in the
(1) Deccan Trap
(2) Himalayas
(3) Indo-Gangetic Plain
(4) North-Eastern Hills
(SSC Tax Assistant (Income Tax &
Central Excise) Exam. 05.12.2004)
13. Which one of the following types
of erosion is responsible for the
formation of Chambal Ravines ?
(1) Splash (2) Sheet
(3) Rill (4) Gully
(SSC Section Officer (Audit)
Exam. 05.06.2005)
14. Consider the following geological
phenomena :
I. Development of a fault
II. Movement along a fault
III. Impact produced by a volcanic eruption
IV. Folding of rocks
Which of the above causes earthquakes ?
(1) I, II and III (2) II and IV
(3) I, III and IV (4) I to IV
(SSC Statistical Investigators
Grade–IV Exam. 31.07.2005)
15. Shale is metamorphosed into
which of the following rocks?
(1) Graphite (2) Gneiss
(3) Marble (4) Slate
(SSC Combined Graduate Level
Prelim Exam. 13.11.2005
(Second Sitting)
16. Where are the hot deserts generally found ?
(1) On the eastern margins of
the Tropics
(2) On the western margins of
the Tropics
(3) Nearer the Equator
(4) In the middle of the Continents
(SSC Combined Graduate Level
Prelim Exam. 13.11.2005
(Second Sitting)
17. Why are winters more severe in
Southern Hemisphere than in
Northern Hemisphere?
(1) Earth is titled towards the
sun in the Northern Hemisphere
(2) Northern Hemisphere receives more sunlight
(3) Because of more iceberg activity in Southern Hemisphere
(4) Southern Hemisphere is less
inhabited
(SSC Combined Graduate Level
Prelim Exam. 13.11.2005
(Second Sitting)
18. Marble is the metamorphosed
form of
(1) Shale (2) Basalt
(3) Sandstone (4) Limestone
(SSC Tax Assistant (Income Tax &
Central Excise) Exam.11.12.2005)
19. The highest mountain peak of
the Himalayas is situated in—
(1) India (2) Tibet
(3) Nepal (4) China
(SSC Statistical Investigators
Grade–IV Exam. 13.08.2006)
20. Metamorphic rocks originate
from—
(1) igneous rocks
(2) sedimentary rocks
(3) both igneous and sedimentary rocks
(4) None of these

Ans: 11. (4) 12. (1)
13. (4) 14. (1) 15. (4) 16. (2)
17. (1) 18. (4) 19. (3) 20. (3)

Explainations:

1. (4) A mushroom rock, also called rock pedestal or a
pedestal rock, is a naturally occurring rock whose
shape, as its name implies, strikingly resembles a
mushroom. Usually found in desert areas, these rocks
are formed over thousands of years when wind erosion
of an isolated rocky outcrop progresses at a different
rate at its bottom to that at its top.

2. (1) The Deccan Traps are a large igneous province
located on the Deccan Plateau of west-central India
(between 17°–24°N, 73°–74°E) and one of the largest
volcanic features on Earth. They consist of multiple
layers of solidified flood basalt that together are more
than 2,000 m (6,562 ft) thick and cover an area of
500,000 km2
(193,051 sq mi) and a volume of
512,000 km3
(123,000 cu mi). The term “trap”, used
in geology for such rock formations, is derived from
the Swedish word for stairs and refers to the steplike hills forming the landscape of the region.

3. (4) Chambal ravine formation significantly increases
soil loss from agricultural lands and severely impacts
agricultural productivity. A review of ephemeral gully
erosion and spreading rates of the ravenous tracks
of Lower Chambal Valley using geospatial tools shows
that both the ravenous and the marginal lands have
increased during the last 15 years.

4. (1) Earthquakes are caused by faulting, a sudden
lateral or vertical movement of rock along a rupture
(break) surface. Earthquakes often occur in volcanic
regions and are caused there, both by tectonic faults
and the movement of magma in volcanoes. Such
earthquakes can serve as an early warning of volcanic
eruptions, as during the Mount St. Helens eruption
of 1980.

5. (4) From depth of burial by continual sediment
deposition from above, or from compressional stress
from tectonic plate collisions, shale is metamorphosed
into slate over periods of millions of years. During
this compression, the clay minerals making up the
shale decompose as they become unstable in the high
pressure environment, and their chemical
components are gradually transformed into minerals
that are more stable in the newly forming higher
pressure environment.

6. (2) The deserts lie in the belt of the trade winds which
blow from northeast in the northern hemisphere and
southeast in the southern hemisphere. There-fore,
the general direction of the trade winds is from the
east to west. These winds shed their moisture on
the eastern margins of the continents and by the
time they reach the west they have lost their moisture.
The hot desert climate is found around the tropics of
Capricorn and Cancer, usually on the west side of
continents. Examples are the Thar Desert in Pakistan
and the Atacama desert in Chile.

7. (1) The winter in the Southern Hemisphere occurs
when the Northern hemisphere is tilted more toward
the Sun. From the perspective of an observer on the
Earth, the winter Sun has a lower maximum altitude
in the sky than the summer Sun.

8. (4) Marble is a non-foliated metamorphic rock
composed of re-crystallized carbonate minerals, most
commonly calcite or dolomite. Geologists use the term
“marble” to refer to metamorphosed limestone. Marble
is a rock resulting from metamorphism of
sedimentary carbonate rocks, most commonly
limestone or dolomite rock. Metamorphism causes
variable recrystallization of the original carbonate
mineral grains. The resulting marble rock is typically
composed of an interlocking mosaic of carbonate
crystals. Primary sedimentary textures and structures
of the original carbonate rock (protolith) have typically
been modified or destroyed.

9. (3) Overall, the Himalayan mountain system is the
world’s highest, and is home to the world’s highest
peaks, the Eight-thousanders. The Mount Everest is
the highest peak having elevation of 8848 m and is
situated in East of Kathmandu on Sagarmatha Zone
Nepal. Mount Everest is the Earth’s highest mountain,
with a peak at 8,848 metres above sea level. It is
located in the Mahalangur section of the Himalayas.
The international border between China and Nepal
runs across the precise summit point.

10. (3) Metamorphic rocks are rocks that have “morphed”
into another kind of rock. These rocks were once
igneous or sedimentary rocks. How do sedimentary
and igneous rocks change? The rocks are under tons
and tons of pressure, which fosters heat build-up,
and this causes them to change. If you exam
metamorphic rock samples closely, you’ll discover
how flattened some of the grains in the rock are.

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