i. Limestone Pavement: A flat, exposed area of limestone characterized by blocks called clints and fissures called grikes.
ii. Karst Topography: A landscape formed from the dissolution of soluble rocks including limestone and dolomite.
iii. Alluvial Fan: A fan-shaped deposit formed when a stream's velocity decreases as it exits a mountain range onto a flat plain.
iv. Pothole: A circular hole in a rock bed formed by the swirling action of water and sediment.
Which of the statements is/are true?
Assertion (A)- Valleys start as small and narrow rills; the rills will gradually develop into long and wide gullies; the gullies will further deepen, widen, and lengthen to give rise to valleys.
Reason (R)- In streams that flow rapidly over steep gradients, normally erosion is concentrated on the bottom of the stream channel
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Which coastal feature is formed as a ridge of sand and shingle lying approximately parallel to the coast and typically exposed during low tide?
Which of the following stages do landforms undergo as they evolve over time?
Which of the following best describes incised or entrenched meanders?
Which of the following statement(s) is/are true-
Statement I: Glaciers can cause significant erosion by plucking and abrasion, leading to the formation of U-shaped valleys.
Statement II: U-shaped valleys are primarily formed by rivers eroding through soft, unconsolidated sediments.
Assertion (A): River terraces are surfaces marking old valley floor or floodplain levels and are products of erosion due to vertical erosion by the stream into its own depositional floodplain.
Reason (R): Alluvial fans are formed when streams flowing from higher levels break into foot slope plains of low gradient and deposit coarse load as broad low to high cone-shaped deposits.
What is the primary geomorphic agent responsible for land surface degradation in areas with high humidity and heavy rainfall?
Consider the following statements:
i. Braided Channels are formed when rivers carry coarse material, leading to the deposition of sediments that create a network of small channels.
ii. Stalactites rise from the floor of caves, forming columns or pillars.
iii. Sinkholes are depressions formed by the collapse of surface layers in limestone regions.
iv. Peneplain is a nearly level plain formed by prolonged erosion, reducing the landscape to a near-flat surface.
Which of the statements is/are true?
Arrange the following landform evolution stages in the correct chronological order:
Assertion (A): Groundwater contributes to the formation of caves in limestone regions through the process of solution.
Reason (R): This process occurs because limestone is highly soluble in carbonated water, which percolates through cracks and joints.
Assertion (A): River terraces can form on only one side of a river, creating what is known as unpaired terraces.
Reason (R): Unpaired terraces are typically formed in areas where there is uniform tectonic uplift on both sides of the river.
i. Peneplain: A nearly level plain formed by prolonged erosion.
ii. Gorge: A deep valley with steep sides, often formed by a river.
iii. Plunge Pool: A deep hole at the base of a waterfall formed by the impact of water.
iv. Canyon: A narrow valley with steep, step-like sides, wider at the top than at the bottom.
Which of the statements is/are true?
Which of the statements is/are true?
i. Stalactite: A formation hanging from the ceiling of a cave, formed by the deposition of calcium carbonate.
ii. Sinkhole: A depression or hole in the ground caused by the collapse of a surface layer.
iii. Braided Channel: A river channel that consists of a network of small channels separated by small and often temporary islands.
iv. Monadnock: An isolated hill or ridge of erosion-resistant rock rising above a peneplain.
180 videos|475 docs|195 tests
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180 videos|475 docs|195 tests
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