name the physiographic divisions of india . explain the significance of each
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--> India has a coastline of 7516.6 km of total land frontier 15200 km and Tropic of Cancer passes almost middle through its crossing over the states of Gujarat, Rajasthan, Madhya Pradesh, Chhattisgarh, Jharkhand, Paschim Banga, Tripura and Mizoram.
--> India lies largely on the Indian Plate, the northern portion of the Indo-Australian Plate, whose continental crust forms the Indian subcontinent Physical divisions, are marked by natural configuration. India is divided into six physiographic divisions on basis of the varied physiographic features: units as follows:
• Northern and North-eastern Mountain;
Punjab Himalayas:
A large portion of Punjab Himalayas is in Jammu and Kashmir and Himachal Pradesh. Hence they are also called the Kashmir and Himachal Himalaya.
Major ranges: Karakoram, Ladakh, Pir Panjal, Zaskar and Dhaola Dhar.
The general elevation falls westwards.
The Kashmir Himalayas are also famous for Karewa formations.
‘Karewas’ in Kashmiri language refer to the lake deposits, found in the flat-topped terraces of the Kashmir valley and on the flanks of the Pir Panjal range.
These deposits consist of clays, silts and sands, these deposits also show evidence of glaciation.
The occurrence of tilted beds of Karewas at the altitudes of 1500-1800m on the flanks of the Pir Panjal strongly suggests that the Himalayas were in process of uplift as late as Pliocene and Pleistocene (1.8mya to 10kyears ago)
Karewas are famous for the cultivation of Zafran, a local variety of saffron.
• Northern Plain;
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.
• Peninsular Plateau;
The Deccan Plateau is a large plateau in western and southern India. It rises to 100 metres in the north, and to more than 1,000 metres in the south, forming a raised triangle within the south-pointing triangle of the Indian coastline.
• Indian Desert;
The Thar Desert, also known as the Great Indian Desert, is a large arid region in the northwestern part of the Indian subcontinent that covers an area of 200,000 km² and forms a natural boundary between India and Pakistan. It is the world's 17th largest desert, and the world's 9th largest subtropical desert.
• Coastal Plains;
A coastal plain is flat, low-lying land adjacent to a sea coast. Some of the largest coastal plains are in Alaska and the southeastern United States.
• Islands
An island or isle is any piece of subcontinental land that is surrounded by water. Very small islands such as emergent land features on atolls can be called islets, skerries, cays or keys. An island in a river or a lake island may be called an eyot or ait, and a small island off the coast may be called a holm. Sedimentary islands in the Ganges delta are called chars. A grouping of geographically or geologically related islands, such as the Philippines, is referred to as an archipelago.