BPSC CCE Prelims
Geomorphology Previous Year Questions (PYQs)
Showing solved Previous Year Questions for Chapter: Geomorphology
Topic Breakdown: Scroll →
Dalmetian Coast is
Detailed Explanation:
The Dalmatian Coast is a classic example of a submergent coastline formed in karst topography along the eastern Adriatic Sea (mainly Croatia).
Parallel limestone ridges and valleys were created by erosion of soluble limestone; when sea levels rose, valleys were submerged, forming elongated islands and inlets parallel to the shore—characteristic of karst foot-hill submergence.
Which type of rock is formed from cooling and solidification of lava?
Detailed Explanation:
Igneous rocks form from the cooling and solidification of molten lava (on Earth's surface) or magma (below surface).
Common examples include basalt (fine-grained), pumice (porous), and obsidian (glassy texture).
The southern continent broken from Pangae is called
Detailed Explanation:
Gondwanaland was the southern supercontinent that broke away from Pangaea around 200 million years ago, comprising present-day South America, Africa, Antarctica, Australia, and the Indian subcontinent.
Laurasia was the northern counterpart that included North America, Europe, and Asia, while the Pacific Ocean is a water body, not a continental mass.
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The theory of continental drift was developed by
Detailed Explanation:
Alfred Wegener (1912) proposed the Theory of Continental Drift, suggesting that continents were once part of a supercontinent Pangaea and drifted apart over geological time.
J. J. Wilson contributed to plate tectonics, Du Toit supported Wegener's theory with evidence from Gondwanaland, and H. Hess developed seafloor spreading theory—but none originated the drift hypothesis.
Therefore, A. Wegener developed the continental drift theory, making Option 2 the correct answer.
Which of the following statements are concerned with eskers and drumlins?
- Eskers are ridges of crudely bedded gravels and sands.
- Drumlins are constituted mostly of boulder and clay.
- Basket of eggs topography is the characteristic of terrains with eskers
- While eskers are built by glacier streams, drumlins result from glacier action.
Choose the correct answer from the options given below.
Detailed Explanation:
Eskers are sinuous ridges formed by glacial meltwater streams, composed of crudely bedded gravels and sands (Statement 1 correct). Drumlins are streamlined hills formed by direct glacial action, consisting mainly of boulder clay/till (Statement 2 correct). Statement 4 correctly distinguishes their formation: eskers by subglacial streams, drumlins by moving ice.
Statement 3 is incorrect: "Basket of eggs topography" characterizes terrain with drumlins, not eskers. Drumlin fields resemble baskets of eggs when viewed from above due to their oval, clustered appearance.
Therefore, statements 1, 2, and 4 are correct, making Option 2 the correct answer.
Which elements are abundant in the formation of interior layer of the earth Nife?
Detailed Explanation:
The Earth's core, called Nife, is composed primarily of nickel (Ni) and iron/ferrum (Fe), making it the densest layer (density 9.5–14.5 g/cm³).
The mantle is made of silicon and magnesium (Sima), while the crust consists of silicon and aluminium (Sial)—neither forms the core.
Therefore, nickel and ferrum are abundant in Nife, making Option 3 the correct answer.
Who among the following postulated the concept of geographical cycle of erosion?
Detailed Explanation:
William Morris Davis (W. M. Davis) postulated the geographical cycle of erosion in 1899, also known as the cycle of erosion. This model describes landform evolution through sequential stages: youth, maturity, and old age.
S. W. Wooldridge contributed to geomorphology but did not develop this cycle; Kober worked on mountain building theories; A. Holmes is known for geochronology and mantle convection—none proposed the erosion cycle.
Therefore, W. M. Davis is the correct answer, making Option 1 correct.