SOLVED PYQs UGC NET (GEOGRAPHY)
Earth Movements
UGC NET GEOGRAPHY
Geomorphology (UNIT 1)
1. Match the List-I with List-II and select the correct answer using the codes given below. (DEC 2013)
| List-I (Types of faults) | List-II (Descriptions) |
|---|---|
| A. Normal fault | I. Displacement of both the rock blocks in opposite directions |
| B. Reverse fault | II. Movement of both the rock blocks towards each other |
| C. Lateral fault | III. Displacement of rock block horizontally along fault plane |
| D. Step fault | IV. When the slopes of a series of faults are in the same direction |
Codes
(1) A-I, B-II, C-III, D-IV
(2) A-IV, B-III, C-II, D-I
(3) A-III, B-I, C-II, D-IV
(4) A-II, B-III, C-I, D-IV
2. Lateral Planation Theory of pediment formation was proposed by (JUNE 2014)
(1) Lawson
(2) Davis
(3) Gilbert
(4) McGee
3. Which of the following is strongly presumptive of fault-line scarps? (JUNE 2014)
(1) Superimposed drainage across a fault
(2) Poor correlation between rock resistance and topographic forms
(3) Frequent severe earthquakes
(4) Actual fault plane identified along a scarp
| Q. No. | Answer | Q. No. | Answer | Q. No. | Answer | Q. No. | Answer | Q. No. | Answer |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 1 | 2 | 3 | 3 | 1 | 4 | 4 | 5 | 3 |
| 6 | 4 | 7 | 4 | 8 | 4 | 9 | 1 | 10 | 2 |
| 11 | 2 | 12 | 2 | 13 | 4 | 14 | 1 | 15 | 3 |
| 16 | 3 | 17 | 2 | 18 | 2 | 19 | 4 | 20 | 3 |
| 21 | 4 |
1. Match the List-I with List-II and select the correct answer using the codes given below. (DEC 2013)
| List-I (Types of faults) | List-II (Descriptions) |
|---|---|
| A. Normal fault | I. Displacement of both the rock blocks in opposite directions |
| B. Reverse fault | II. Movement of both the rock blocks towards each other |
| C. Lateral fault | III. Displacement of rock block horizontally along fault plane |
| D. Step fault | IV. When the slopes of a series of faults are in the same direction |
Codes
(1) A-I, B-II, C-III, D-IV
(2) A-IV, B-III, C-II, D-I
(3) A-III, B-I, C-II, D-IV
(4) A-II, B-III, C-I, D-IV
Correct Answer (1): The correct matching is A-I, B-II, C-III, D-IV. Normal Fault: Formed by rock displacement in opposite directions due to stress. The fault plane is between 45 degrees and vertical, creating a steep fault scarp. Example: Sierra Nevada, USA. Reverse Fault: Created by rock blocks moving towards each other with a fault planeinclined between 40 degrees and horizontal. Horizontal stress is maximal. Example: Faults in the Rockies and Himalayas. Lateral/Strike-Slip Fault: Occurs due to horizontal displacement along the fault plane, with left-lateral or right-lateral movement. Example: Anatolian Fault, Turkey. Stage Fault: A series of faults with planes sloping in the same direction, resulting in downward displacement of all blocks.
2. Lateral Planation Theory of pediment formation was proposed by (JUNE 2014)
(1) Lawson
(2) Davis
(3) Gilbert
(4) McGee
Correct Answer (3): The Lateral Planation Theory of pediment formation was proposed by Grove Karl Gilbert in 1877. This theory posits that pediments-gently sloping rock surfaces at the base of mountains are formed through lateral erosion by streams. According to Gilbert, streams gradually widen their valleys by eroding the sides of the surrounding terrain, leading to the creation of these broad, flat surfaces. This theory highlights the importance of lateral erosion in the development of landscapes and the formation of pediments.
3. Which of the following is strongly presumptive of fault-line scarps? (JUNE 2014)
(1) Superimposed drainage across a fault
(2) Poor correlation between rock resistance and topographic forms
(3) Frequent severe earthquakes
(4) Actual fault plane identified along a scarp
Correct Answer (1): Superimposed drainage across a fault is a strongly presumptive indicator of a fault line scarp. This occurs when a river, initially flowing over a softer rock stratum, continues to follow its original slope even upon reaching harder basal rocks. The river’s path appears unrelated to the underlying harder rock bed, demonstrating its significant erosive power to cut through various types of bedrock while maintaining its initial drainage pattern. Consequently, the drainage pattern does not correspond to the hardness or softness of the bedrock or the locations of faults and fractures, indicating the presence of a fault line scarp.