1. Wear and tear of exposed country rocks called
2. The specific gravity of coal is heighest in
3. When crystal breaks independently of cleavage plane called
4. An example for basic rocks of intermediate rock of igneious rocks.
5. Mural joints are develop in
6. Generally size of raw coal fed to jig washer is
7. Aggregate of chemical elements called
8. Colour of China clay
9. Hardness of Augite
10. The past history of earth can be known by
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