Geography
The alteration of the composition or structure of a rock by heat, pressure or other natural agency:
- Hypobyssal
- Metamorphism
- Compaction
- Cementation
Related Questions
The rocks like peat, lignite, bituminous and anthracite are example of:
- Igneous rocks
- Mechanical rocks
- Metallic rocks
- Carbonaceous rocks
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.
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.
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.