Pachaimalai Hills

Pachaimalai Hills

      range of hills in Tamil Nadu (Tamil Nādu) state, southern India. They constitute an eastward extension of the Eastern Ghats in the northeastern Tamilnad Uplands. The Pachaimalai Hills, together with the Javadi, Shevaroy, and Kalrayan hills, separate the Kaveri (Cauvery) River (Kaveri River) basin in the south from the Palar River basin in the north. Extending over an area of about 5,200 square miles (13,500 square km), they form a discontinuous line of highlands with a general elevation from 1,770 to 4,620 feet (540 to 1,400 metres). The hills are named for the Pachaimalaiyali peoples who live in the region. The Shangam period in Tamil literature flourished in the area during the Chera, Chola, and Pandya dynasties.

      The region consists of rounded hills composed of granitic gneiss. The hills have scrub jungles on broken ground and sal (Shorea robusta) forests on the flat hilltops. Loamy and clayey soils are found in the valleys. The Vellar, Palar, and Ponnaiyar rivers are dry for much of the year. The economy of the region is based on agriculture; rice, jowar (grain sorghum), sugarcane, gram (chickpeas), peanuts (groundnuts), and bajra (pearl millet) are subsistence crops. Coffee, cashews, and pepper are important plantation crops raised for export.

      Large-scale industries produce textiles, foodstuffs, and chemicals; engineering is also important. Cottage industries include mat and basket weaving, carpentry, blacksmithing, and the manufacture of bidi cigarettes. Iron ore, manganese, beryl, and zinc are mined. About three-fifths of the area's population lives in the Coimbatore-Madurai Uplands. Roads from the northern upland region to the eastern seaboard run along the valleys or other gaps between the hill ranges. Tiruvannamalai, Attur, Ranipet, and Chengam are important towns.

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Universalium. 2010.

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