71. On what basis ignious rocks classified into acid rocks and basic rocks.
72. Hollows left within rock beds are filled up with mineral matter going to rise.
73. Specific gravity of Dolomite
74. Coal containing iron pyrites more liable for
75. Primary period also called
76. Axial plane of fold inclined, both limbs dip in the same direction, usually at different angle called
77. Chalcopirite colour
78. Example for Basic rock
79. Granite is the original rock, and its metamorphic rock is
80. The colour of siderite
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