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GEOGRAPHY Location Sri Lanka is located in the Indian Ocean, just south of India. It is separated from India by the Palk Strait, which is a 30 mile stretch of water. The land The island has a land area of approximately 25,332 square miles. Its extreme height from north to south (from Point Pedro, which is the northern-most point, to Devundara, which is the southern-most point) is 271 miles and its extreme width from east to west is 140 miles. The country is divided into two main portions based on elevation: The Low Country and the Hill Country. The Hill Country occupies about one-fifth of the entire land area Geology A large part of Sri Lanka consists of crystalline rock, known as 'gneiss'. Coral beds and sand dunes are found around the edges of the island. Also present are bands of white crystalline limestone. The crystalline rocks often contain an abundance of minerals. Some of these minerals are given below: Gem stones: These are considered to be the most important crystalline minerals. They are found chiefly in Ratnapura and the area surrounding it. The following is a list of some of the most common gems found in Sri Lanka, categorized according to colour: o Colourless: White sapphire, garnet, quartz, spinel, topaz, tourmaline, zircon o Yellow/orange: Yellow sapphire, garnet, quartz, spinel, topaz, tourmaline, zircon o Brown: Garnet, tourmaline, zircon o Red/pink: Ruby and pink sapphire, garnet, quartz, spinel, tourmaline, zircon o Blue: Blue sapphire, aquamarine, spinel, topaz, tourmaline, zircon o Purple/violet: Amethyst, violet sapphire, spinel, tourmaline o Green: Aquamarine, green sapphire, garnet, topaz, tourmaline o Black: Tourmaline, spinel Graphite: Graphite is found in veins and holes. Chief graphite mines are found in the Western and Southern provinces. It is used for the manufacture of lead pencils and in the iron industry. Felspar: This is found in nearly all the crystalline rocks in varying amounts. Under certain conditions it forms a pure white clay called kaolin which is used for making porcelain Mica: This is found in veins and occurs in three forms - black, white and yellow. Iron ore Rivers and waterfalls Sri Lanka has a large number of rivers. Some of these are listed below: Mahaweli Ganga Aruvi Aru Kala Oya Kelani Ganga Deduru Oya Maha Oya Menik Ganga Kalu Ganga Gal Oya The island also has quite a few waterfalls in the hill country. Here are the names of some of the chief waterfalls in Sri Lanka: Victoria Falls Laxapana Falls Devon Falls Kotmale Falls Dunhinda Falls Diyaluma Falls Aberdeen Falls Ramboda Falls St. Clair Falls Climate Sri Lanka does not have four seasons. Its weather is centred around two monsoons, one from May to August (the south-west monsoon) and the other from November to February (the north east monsoon).