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Q: The rocks that possess crystalline and compact grains are called :
  • A. siliceous rocks
  • B. stratified rocks
  • C. unstratified rocks
  • D. foliated rocks
Correct Answer: Option C - Unstratified Rocks – Unstratified rocks are those rocks which do not have distinct plane of stratification. Such rocks, therefore, can not be splitted into thin layers. The structure of such rocks may be crystalline granular or compact granular. The examples of such rocks are granite, basalt, trap etc. Stratified Rocks– It show distinct layers along which the rocks can be split. The examples are sandstone, limestone, shale, slate marble etc. Foliated Rocks– It have a tendency to split up only in a definite direction. Foliated structure is quite common in metamorphic rocks.
C. Unstratified Rocks – Unstratified rocks are those rocks which do not have distinct plane of stratification. Such rocks, therefore, can not be splitted into thin layers. The structure of such rocks may be crystalline granular or compact granular. The examples of such rocks are granite, basalt, trap etc. Stratified Rocks– It show distinct layers along which the rocks can be split. The examples are sandstone, limestone, shale, slate marble etc. Foliated Rocks– It have a tendency to split up only in a definite direction. Foliated structure is quite common in metamorphic rocks.

Explanations:

Unstratified Rocks – Unstratified rocks are those rocks which do not have distinct plane of stratification. Such rocks, therefore, can not be splitted into thin layers. The structure of such rocks may be crystalline granular or compact granular. The examples of such rocks are granite, basalt, trap etc. Stratified Rocks– It show distinct layers along which the rocks can be split. The examples are sandstone, limestone, shale, slate marble etc. Foliated Rocks– It have a tendency to split up only in a definite direction. Foliated structure is quite common in metamorphic rocks.