One wall of rock. Two Indias.
Sixteen hundred kilometres of it, down India’s west coast.
Same sun. Same latitude. One difference.
Wet sea to the west. Dry plateau to the east.
The wind hits the scarp, climbs, cools — and lets go. Six thousand millimetres a year.
Warm rain rinses the silica out and leaves the iron behind. That is the red.
Underneath sits the ancient basement of peninsular India — worn down long before the Himalaya existed.
Not crumpled like the Himalaya. An escarpment — the eroded shoulder of the Deccan Plateau. A sharp wall to the west to catch the wind; a long ramp east for the rain shadow.
The southwest monsoon meets the scarp head-on and has nowhere to go but up — orographic rainfall. Cross the crest and the air is wrung dry: the rain shadow starts at once.
The Godavari, Krishna and Kaveri all rise in or near this range. A narrow strip of coastal forest decides whether the dry interior drinks.
Over 7,000 species, a startling share of them found nowhere else — one of the world’s eight hottest biodiversity hotspots. Up high the forest breaks into shola and grassland.
Tea, coffee and cardamom on the cool uplands; the Toda and Kadar holding deep knowledge of the forest. And roads, dams and estates cutting it into pieces.
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Figures are teaching-grade and awaiting the fact-verification gate and human sign-off. Every claim carries a logged source; unverifiable claims are cut before public release.
Curriculum alignment · NGSS MS-ESS2-5 / HS-ESS2-4 · AP Human Geography · AP Environmental Science · IB DP Geography · CBSE Geography (X) · ICSE · Cambridge IGCSE 0460
