The Narmada is closely associated with Lord Shiva. Naturally formed smooth stones called banas, made of cryptocrystalline quartz, are found in Narmada which are known as Shivalingas; the rare and unique markings on them are regarded by shaivaites as very auspicious. The Brihadeeswara Temple in Thanjavur has one of the biggest Bana Shivalingas.

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