- 2068 Chaitra · 1 mark
Short note: Marble
Short answer
Marble is a non-foliated metamorphic rock formed by recrystallisation of limestone or dolomite. Composed of interlocking calcite crystals, hardness 3, specific gravity 2.7, compressive strength 70-140 MPa. Takes a polish for flooring/cladding, but is attacked by acid rain; found in Lesser Himalaya.
Write a short note on marble.
Marble is a non-foliated metamorphic rock formed by recrystallisation of limestone or dolomite under heat and pressure. It is composed of interlocking calcite crystals (granoblastic texture), white or coloured with veins due to impurities. Hardness 3, specific gravity about 2.7, compressive strength about 70 - 140 MPa, effervesces with dilute HCl. It takes a fine polish and is used for flooring, cladding, steps and sculpture. It is attacked by acid rain, so it is not suitable for outdoor use in polluted areas. It is found in the Lesser Himalaya (for example Godavari, Kathmandu).
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