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प्रश्न
Distinguish between Thermal metamorphism and Dynamic metamorphism.
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उत्तर
Thermal metamorphism : When the transformation of the original rock takes place principally because of the influence of high temperature, the rock is said to be caused through Thermal metamorphism. For example, graphite (from coal) and slate (from clay). The heat may result from the intrusion of hot magma or from the friction of moving rock layers. It may also occur due to chemical changes.
Dynamic metamorphism : When the transformation of the original rock takes place mainly because of the influence of pressure at a great depth within the earth’s crust, it is known as Dynamic Metamorphism.
संबंधित प्रश्न
Classify the following rocks by selecting the correct option given below:
marble
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Name the three stages of lithification of Sedimentary rocks.
Which agents are responsible for deposition of sediments?
Distinguish between the following:
Calcarious and Carbonacious rocks.
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Decomposition of organic matter at different stages and over different periods of time.
Classify the igneous rocks on the basis of their place of origin.
How are sedimentary rocks classified on the basis of their formation?
Name the main types of rocks.
Classify the following rock: Slate
Give one word for the following.
The outer layer of the earth.
Give one word for the following.
The core of the earth occupied by rock in iron and nickel.
Fill in the blanks
The interior layer is the core, which is made up mainly of iron and nickel, and is called ______.
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Give one term for the following statement:
Formed by evaporation in saline lakes.
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______ are chemical substances which exist in nature.
Explain the different types of sedimentary rocks.
Match the following.
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
