Fri. Jun 21st, 2024

Karst Geomorphology

  1. Which of the following areas is not classified as a major Karst area?

    Options:
    1. Spanish Andalusia
    2. Western Cuba
    3. Chalk area of England (Peak District)
    4. Carlsbad area of the USA

    Option: C

  2. Why has limestone topography in India not been properly identified and studied?

    Options:
    1. Because of the non-existence of extensive thick limestone formations near the surface
    2. Because of the difficulty in accessing the limestone formations due to their remote locations
    3. Because of the lack of interest among geologists in studying limestone topography
    4. Because of the absence of proper equipment to study limestone formations

    Option: A

  3. Which of the following is not one of the essential conditions for the development of Karst topography?

    Options:
    1. The limestone should be porous.
    2. The limestone should be above the groundwater table.
    3. The position of limestone should favor surface drainage to disappear through sinks, blind valleys, and sinking creeks.
    4. The limestone should be massive, thickly bedded, hard and tenacious, well-cemented, and well-jointe

    Option: A

  4. The term used to describe the landforms formed due to erosion in the Karst region is

    Options:
    1. Lapies
    2. Caves
    3. Stalagmites
    4. Solution holes

    Option: A

  5. What are the weathering residues called that are left at the surface due to corrosion of limestone along their joints?

    Options:
    1. Karst morphology
    2. Lapies
    3. Terra rosa
    4. Swallow holes

    Option: C

  6. The process by which chemically active rainwater dissolves limestone along their joints and develops various types of solution holes is called

    Options:
    1. Weathering
    2. Corrosion
    3. Erosion
    4. Solution

    Option: D

  7. What are the two types of sink holes that are generally observed?

    Options:
    1. Funnel-shaped and cylindrical
    2. Circular and oval
    3. Rectangular and square
    4. Cone-shaped and pyramid-shaped

    Option: A

  8. The name given to the large hole formed due to the coalescence of closely spaced sink holes is

    Options:
    1. Solution pan
    2. Dolines
    3. Karst lakes
    4. Swallow holes

    Option: D

  9. The depressions caused by the collapse of the ground surface due to the formation of cavities below the ground surface is called

    Options:
    1. Cockpits
    2. Poljes
    3. Uvalas
    4. Solution holes

    Option: A

  10. The extensive depressions that are characterized by vertical side walls, flat alluvial floors, and central lakes is known as

    Options:
    1. Sink holes
    2. Dolines
    3. Uvalas
    4. Poljes

    Option: D

  11. Which of the following is not a feature of poljes?

    Options:
    1. independent surface drainage system
    2. Steep sides
    3. Irregular borders
    4. Deposition of clay on the floors

    Option: B

  12. The process by which the grabens formed due to downdropping and downfaulting of limestone areas are modified to form poljes is

    Options:
    1. Weathering
    2. Erosion
    3. Deposition
    4. Solution work of water

    Option: D

  13. Where are poljes frequently found?

    Options:
    1. In the Karst region of former Yugoslavia and Jamaica
    2. In the United States and Canada
    3. In Europe and Asia
    4. In South America and Africa

    Option: A

  14. What is a karst plain?

    Options:
    1. A region of limestone with vertical beds
    2. A region of limestone with inclined beds
    3. A region of sandstone with horizontal beds
    4. A region of sandstone with inclined beds

    Option: B

  15. What is a sinking creek?

    Options:
    1. A creek with water that flows underground through a single sink
    2. A creek with water that flows underground through many sinks
    3. A creek with no water flow
    4. A creek that overflows during heavy rainfall

    Option: B

  16. What is a blind valley?

    Options:
    1. A valley with no sinkholes or swallow holes
    2. A valley that terminates at a swallow hole or sinkhole
    3. A valley with no surface water flow
    4. A valley with a stream flowing through it

    Option: B

  17. What are karst valleys?

    Options:
    1. Valleys formed by the erosion of sandstone
    2. Valleys formed by the erosion of limestone
    3. Valleys formed by the accumulation of sediment
    4. Valleys formed by the action of wind

    Option: B

  18. What are caves?

    Options:
    1. Large depressions formed by tectonic activity
    2. Voids formed by the erosion of groundwater in limestone
    3. Holes formed by the dissolution of granite
    4. Cracks formed by the expansion of rocks due to heat

    Option: B

  19. Which of the following theories suggests that caves are formed by abrasion of limestone by groundwater in the vadose zone above the water table?

    Options:
    1. Two-cycle theory
    2. Water table theory
    3. Corrasion theory
    4. Static water zone theory

    Option: C

  20. Which theory postulated by W.M. Davis contradicts the corrasion theory and suggests that caves are formed by phreatic water under hydrostatic pressure below the water table?

    Options:
    1. Two-cycle theory
    2. Water table theory
    3. Corrasion theory
    4. Static water zone theory

    Option: A