Physical Geography of India
India's physical geography is six blocks stacked from north to south: the Himalaya, the northern plains, the peninsular plateau, the deserts, the coastal plains and the islands. Learn the blocks and their boundaries first; individual peaks and passes are much easier to place once the frame exists.
Mental model
Read India as five stacked bands from north to south: (1) the young fold Himalayas, (2) the flat alluvial Northern Plains, (3) the old rigid Peninsular Plateau, (4) the Coastal Plains, (5) the Islands. Age and rock type explain everything else — young + folded means high, unstable, snow-fed perennial rivers; old + rigid means low, stable, rain-fed seasonal rivers. Any physiography question is answered by first asking 'which band?' and then 'young or old?'.
Associations
A short trigger on the left, everything it pulls with it on the right.
North to south: fold, plain, plateau, coast, island.
Young fold mountains in the north (Himalaya, in three parallel ranges — Greater, Lesser and Shiwalik), the alluvial Indo-Gangetic plain below them, the old hard peninsular plateau south of that, coastal plains on both flanks, and two island groups. Everything else is detail inside one of these five.
The Ghats meet at the Nilgiris.
The Western Ghats run continuously and high along the west coast; the Eastern Ghats are broken and lower. They converge at the Nilgiri hills, where Doddabetta stands. Anaimudi in the Anaimalai hills is the highest peak of peninsular India.
Things to remember
The night-before list. Short enough to recall cold.
- 1Kanchenjunga is the highest peak within India; K2 lies in territory India claims but does not administer.
- 2Anaimudi in Kerala is the highest peak of peninsular India; Doddabetta is the highest in the Nilgiris.
- 3The Tropic of Cancer passes through eight Indian states, and Gujarat is the westernmost of them.
- 4The peninsular plateau is made of ancient crystalline and Deccan trap rock — old, stable and mineral-rich, unlike the young sedimentary Himalaya.
- 5The Western Ghats are a UNESCO-recognised biodiversity hotspot and one of the world's eight 'hottest' hotspots.
In detail
- The Himalayas run in three roughly parallel ranges: Greater Himalaya (Himadri) with the highest peaks and perpetual snow, Lesser Himalaya (Himachal) holding the hill stations and valleys like Kashmir and Kangra, and the outermost Shiwaliks, whose flat-floored valleys between Shiwalik and Lesser Himalaya are called Duns (Dehra Dun, Kotli Dun).
- The Peninsular Plateau is bounded by the Western Ghats (continuous, higher, crossed only through passes such as Thal Ghat, Bhor Ghat and Pal Ghat) and the Eastern Ghats (discontinuous, lower, dissected by the east-flowing rivers). Because the plateau tilts eastward, most peninsular rivers — Godavari, Krishna, Kaveri, Mahanadi — flow east into the Bay of Bengal.
- Narmada and Tapi are the major exceptions: they flow west into the Arabian Sea through rift valleys (fault troughs), which is why they form estuaries instead of deltas.
- The Northern Plains are built entirely of alluvium brought by the Indus, Ganga and Brahmaputra systems. Older, terrace-like, coarse alluvium is called Bhangar; newer flood-plain alluvium is Khadar. Bhabar is the porous pebbly belt at the Shiwalik foot where streams vanish underground, and Terai is the marshy belt just south of it where they re-emerge.
- India has two island groups of opposite origin: the Andaman and Nicobar Islands in the Bay of Bengal are the tops of a submerged mountain chain (with Barren Island, India's only active volcano), while the Lakshadweep Islands in the Arabian Sea are coral atolls built on a volcanic base.
Where people slip
- The Himalaya are young fold mountains of sedimentary rock; the peninsular plateau is ancient igneous and metamorphic rock. Options that reverse this are wrong.
Check yourself
Nothing here is scored — it will not change your mastery figures.
The Western Ghats and the Eastern Ghats converge at:
From the question bank
Which of the following is the oldest fold mountain range in India?
From the question bank
The narrow coastal plain lying between the Western Ghats and the Arabian Sea, stretching through Maharashtra and Goa, is known as:
Books to read
- NCERT Class XI — India: Physical Environment
- NCERT Class XI — Fundamentals of Physical Geography
- Certificate Physical and Human Geography by Goh Cheng Leong
Official sources
Hand-checked official domains only — the notes above carry no links of their own.