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Q: Which of the following is the chemical classification of rocks?
  • A. Siliceous rock
  • B. Unstratified rock
  • C. Stratified rock
  • D. Foliated rock
Correct Answer: Option A - Chemical Classification of rock– Siliceous rocks– In these rocks, silica predominates. These rocks are hard and durable. They are not easily affected by the weathering agencies. Granites, Quartzite, Basalt, Trap etc. are examples of siliceous rocks. Argillaceous rocks– In these rocks, clay predominates. Such rocks may be dense and compact or they may be soft. Slates, laterities etc. are examples of argillaceous rocks. Calcareous rocks– In these rock, calcium carbonate predominates. The durability of these rocks will depend upon the constituents present in surrounding atmosphere. Limestone, marbles, dolomite etc. are examples of calcareous rocks.
A. Chemical Classification of rock– Siliceous rocks– In these rocks, silica predominates. These rocks are hard and durable. They are not easily affected by the weathering agencies. Granites, Quartzite, Basalt, Trap etc. are examples of siliceous rocks. Argillaceous rocks– In these rocks, clay predominates. Such rocks may be dense and compact or they may be soft. Slates, laterities etc. are examples of argillaceous rocks. Calcareous rocks– In these rock, calcium carbonate predominates. The durability of these rocks will depend upon the constituents present in surrounding atmosphere. Limestone, marbles, dolomite etc. are examples of calcareous rocks.

Explanations:

Chemical Classification of rock– Siliceous rocks– In these rocks, silica predominates. These rocks are hard and durable. They are not easily affected by the weathering agencies. Granites, Quartzite, Basalt, Trap etc. are examples of siliceous rocks. Argillaceous rocks– In these rocks, clay predominates. Such rocks may be dense and compact or they may be soft. Slates, laterities etc. are examples of argillaceous rocks. Calcareous rocks– In these rock, calcium carbonate predominates. The durability of these rocks will depend upon the constituents present in surrounding atmosphere. Limestone, marbles, dolomite etc. are examples of calcareous rocks.