On closure study of its surface features,into how many divisions can we divide the plains?Name them.
Answers
Explanation:
Location and Extent
Formation of Northern Plains
Chief Characteristics
Physiographic Division
The Bhabar
The Terai
The Bhangar
The Khadar
Regional Divisions
Significance of this region
Location and Extent:
Northern plains are the youngest physiographic feature in India. They lie to the south of the Shivaliks, separated by the Himalayan Frontal Fault (HFF). The southern boundary is a wavy irregular line along the northern edge of the Peninsular India. On the eastern side, the plains are bordered by the Purvanchal hills.
The Physiographic Divisions of India: the Northern Plains
Formation of Northern Plains:
Due to the uplift of the Himalayas in the Tethys Sea, the northern part of the Indian Peninsula got subsided and formed a large basin.
Source
That basin was filled with sediments from the rivers which came from the mountains in the north and from the peninsula in the south. These extensive alluvial deposits led to the formation of the northern plains of India.
Chief Characteristics:
The northern plain of India is formed by three river systems, i.e. the Indus, the Ganga and the Brahmaputra; along with their tributaries.
The northern plains are the largest alluvial tract of the world. These plains extend approximately 3200 km from west to east.
The average width of these plains varies between 150 and 300 km. In general, the width of the northern plains increases from east to west (90-100km in Assam to about 500km in Punjab).
The exact depth of alluvium has not yet been fully determined. According to recent estimates, the average depth of alluvium in the southern side of the plain varies between 1300-1400m, while towards the Shiwaliks, the depth of alluvium increases. The maximum depth of over 8000m has been reached in parts of Haryana.
The extreme horizontality of this monotonous plain is its chief characteristic (200m – 291m). The highest elevation of 291 m above mean sea level near Ambala forms a watershed between Indus system and Ganga system).