21. Cacking index called as
22. Specific gravity of Limonite
23. The clay does not fuse below 1580°C called
24. Size of steam coal is
25. Parallel sided vertical wall of ignious rock formed due to upward intrusion of magma called
26. The original rock of limestone in metaphorphic it is
27. Size of rubble coal is
28. High temperature deposits are
29. Country rock contains . . . . . . . .
30. Ore contains . . . . . . . .
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