Define the following - (a) Standard Meridian of India (b) Rift Valley (c) Drainage System
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Answer:
A.Standard Meridian of India : The standard meridian of India is 82.5 degrees east of the Greenwich Meridian. This meridian passes through the city of Allahabad. ... In 1905, this longitude was selected as the meridian to create the Indian Standard Time. In winter, the Indian Standard Time is 5 hours 30 minutes ahead of Greenwich Mean Time.
b. Rift Valley : A rift valley is a linear shaped lowland between several highlands or mountain ranges created by the action of a geologic rift or fault. A rift valley is formed on a divergent plate boundary, a crustal extension or spreading apart of the surface, which is subsequently further deepened by the forces of erosion.
c.Drainage System : In geomorphology, drainage systems, also known as river systems, are the patterns formed by the streams, rivers, and lakes in a particular drainage basin. They are governed by the topography of the land, whether a particular region is dominated by hard or soft rocks, and the gradient of the land.