The Nilgiris along the west coast are relatively tectonically stable as compared to the Himalayas bu...........

Geography Physiography of India

The Nilgiris along the west coast are relatively tectonically stable as compared to the Himalayas; but, still, debris avalanches and landslides occur though not as frequently as in the Himalayas, in these hills. Why?

1. Many slopes are steeper with almost vertical cliffs and escarpments in the Western Ghats and Nilgiris.

2. Mechanical weathering due to temperature changes and ranges is pronounced in this region.

3. They are mostly made up of sedimentary rocks and unconsolidated and semi consolidated deposits.

4. They receive heavy amounts of rainfall over short periods.

Select the correct answer using the codes given below.

1, 2 and 3 only

2, 3 and 4 only

1, 2 and 4 only

1 and 4 only

छोटे Courses बड़े Results

Master Physiography of India

Prepare through Micro-courses

Try Now

Explanation:

The debris avalanches and landslides occur very frequently in the Himalayas because the
Himalayas are tectonically active. They are mostly made up of sedimentary rocks and unconsolidated and semi-consolidated deposits. The slopes are very steep. Compared to the Himalayas, the Nilgiris bordering Tamil Nadu, Karnataka, Kerala and the Western Ghats along the west coast are relatively tectonically stable and are mostly made up of very hard rocks; but, still, debris avalanches and landslides occur though not as frequently as in the Himalayas, in these hills. Why? Many slopes are steeper with almost vertical cliffs and escarpments in the
Western Ghats and Nilgiris. Mechanical weathering due to temperature changes and ranges is pronounced. They receive heavy amount of rainfalls over short period.