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Q: Rocks having alumina or clay as their major constituent are called.
  • A. Siliceous rocks.
  • B. Argillaceous rocks.
  • C. Sedimentary rocks.
  • D. None of the above.
Correct Answer: Option B - Argillaceous rocks : In the argillaceous rock alumina or clay have major constituent. The argillaceous rocks include shales, silt stones and mud stones. Calcareous rock : The chief constituent is Lime (CaO). • In chemical classification of rock, marble is known as calcareous rock. Ex. Lime stone, gypsum, marble, dolomite Siliceous rock : The chief constituent is siliceous rock's sand silica (SiO₂), graphite Exp. Quartzite, granite.
B. Argillaceous rocks : In the argillaceous rock alumina or clay have major constituent. The argillaceous rocks include shales, silt stones and mud stones. Calcareous rock : The chief constituent is Lime (CaO). • In chemical classification of rock, marble is known as calcareous rock. Ex. Lime stone, gypsum, marble, dolomite Siliceous rock : The chief constituent is siliceous rock's sand silica (SiO₂), graphite Exp. Quartzite, granite.

Explanations:

Argillaceous rocks : In the argillaceous rock alumina or clay have major constituent. The argillaceous rocks include shales, silt stones and mud stones. Calcareous rock : The chief constituent is Lime (CaO). • In chemical classification of rock, marble is known as calcareous rock. Ex. Lime stone, gypsum, marble, dolomite Siliceous rock : The chief constituent is siliceous rock's sand silica (SiO₂), graphite Exp. Quartzite, granite.