Geography
Assertion (A): Igneous rocks are of interest to builders and sculptors.
Reason (R): Igneous rocks are usually compact.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R does not explain A.
- A is true but R is false.
- A is false but R is true.
Rocks
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Answer
Both A and R are true and R is the correct explanation of A.
Explanation — Igneous rocks are usually compact and are of interest to builders and sculptors.
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Related Questions
The following pairs are the types of rocks on the basis of agents of their formation. Which of the following is incorrect?
- Lacustrine : lake beds
- Aeolian : sand particles
- Glacial : ocean floor
- Riverine : flowing waters of rivers.
The alteration of the composition or structure of a rock by heat, pressure or other natural agency:
- Hypobyssal
- Metamorphism
- Compaction
- Cementation
The transformation of rocks into metamorphic rocks takes place as a result of intense heat and pressure. Given below are the types of metamorphism and the processes involved. Which one is incorrect?
- Thermal Metamorphism : high temperature.
- Dynamic Metamorphism : pressure at great depths in the crust.
- Regional Metamorphism : large scale earth movement.
- Contact Metamorphism : high pressure below ocean bed.
Study the diagram and identify A, B and C.
- A: action of agents of weathering B: deposition-sedimentation C: action of heat and pressure
- A: deposition-sedimentation B: action of agents of weathering C: action of heat and pressure
- A: deposition-sedimentation B: action of heat and pressure C: action of agents of weathering
- A: action of heat and pressure B: action of agents of weathering C: deposition-sedimentation