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Q: When the rocks are classified on the basis of physical characteristics, the type of rocks that has a tendency to split up in a definite direction only is known as :
  • A. igneous rocks
  • B. siliceous rocks
  • C. foliated rocks
  • D. calcareous rocks
Correct Answer: Option C - Rocks, based on physical characteristics– (i) Stratified rock- Found near earth surface consisting of different layers separated by plane of stratification (ii) Unstratified rock - no visible layer of separation because of rapid cooling of magma (iii) Foliated rock– It's have a tendency to split up only in a definite direction, most of the metamorphic rocks have a foliated structure, except for quartzite and marble which have granulose structure.
C. Rocks, based on physical characteristics– (i) Stratified rock- Found near earth surface consisting of different layers separated by plane of stratification (ii) Unstratified rock - no visible layer of separation because of rapid cooling of magma (iii) Foliated rock– It's have a tendency to split up only in a definite direction, most of the metamorphic rocks have a foliated structure, except for quartzite and marble which have granulose structure.

Explanations:

Rocks, based on physical characteristics– (i) Stratified rock- Found near earth surface consisting of different layers separated by plane of stratification (ii) Unstratified rock - no visible layer of separation because of rapid cooling of magma (iii) Foliated rock– It's have a tendency to split up only in a definite direction, most of the metamorphic rocks have a foliated structure, except for quartzite and marble which have granulose structure.