Parent Rock and its Metamorphic Changed Form
NAME OF THE ROCK | TYPE OF ROCK | NAME OF THE METAMORPHIC ROCK |
Limestone | Sedimentary Rock | Marble |
Dolomite | Sedimentary Rock | Marble |
Sandstone | Sedimentary Rock | Quartzite |
Shale | Sedimentary Rock | Slate |
Slate | Metamorphic Rock | Phylite/Schist |
Coal | Sedimentary Rock | Graphite/Diamond |
Granite | Igneous Rock | Gneiss |
Phyllite | Metamorphic Rock | Schist |
Economic Importance of Metamorphic Rocks
1. Building Construction Materials: Gneiss, quartzite, slate, marble are used as building materials. In India marble is found in Alwar, Ajmer, Jodhpur and Jaipur districts of Rajasthan. The thick sheet of slate is used for laying the surface of billiards table. Slate is found in parts of Riwari (Haryana), Karigra (H.P) and Bihar.
2. Industrial Uses: Graphite is used for making pencils. Its melting point is 3500°C. Therefore pots for melting of metals are made of graphite. Graphite is indispensible for atomic energy power house Quartzite, one of the hardest rocks, used in glass making.
3. Beauty Aids: Steatite is used for making talcum powder and other such beauty aids.
4. Asbestos is fire resistant.
5. Garnet: It is a precious stone. It is used for making abrasives.
