Describe how the Himalayas were formed?
Answers
(a) The oldest landmass of India (peninsular part) was a part of Gondwana land.
(b) Gondwana land included India, Australia, South Africa and South America as one single landmass.
(c) Convectional currents split the crust into a number of pieces. There by leading to the drifting of the Indo - Australian plate after being separated from the Gondwana land towards the North.
(d) The Northward drift resulted in the collision of the plate with the much larger Eurasian plate.
(e) Due to this collision the sedimentary rocks which were accumulated in the geosyncline known as the Tethys, were folded to form the mountain systems of Western Asia and Himalaya.
(f) The Himalayas represent a youthful topography with high peaks, deep valleys and fast following rivers.
We wrote this in our notebooks....:))
answer ::
I learn. Himalayas are formed as 3 parallel ranges ::
Himadri
The features of Himadri are:
It is the northern most range of Himalayas, also called the great or inner Himalayas.
It includes the most prominent Himalayan peaks.
It consists of granite.
Many glaciers descend from Himadri.
The average range of mountains found here is 6,000 metres
Himachal
The altitude varies between 3,700 and 4,500 metres and the average width is of 50 Km.
The ranges are mainly composed of highly compressed and altered rocks.
Shiwalik
They extend over a width of 10-50 Km and have an altitude varying between 900 and 1100 metres.
These ranges are composed of unconsolidated sediments brought down by rivers from the main Himalayan ranges located farther north.