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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
Fill in the blank
Sedimentary rocks such as limestone change into ___________.
State two characteristics of the mantle.
Classify the following rocks by selecting the correct option given below:
gypsum
How are sedimentary rocks formed?
What is Geology?
Which rocks are associated with ores of metals?
Distinguish between the following:
Calcarious and Carbonacious rocks.
Explain the formation of sedimentary rocks on the basis of agents of formation.
What is meant by a rock?
Give some examples of metamorphic rocks formed from sedimentary and igneous rocks.
Classify the following rock: Coal
Classify the following rock: Loess
Classify the following rock: Quartzite
Give one word for the following.
The lower part of ocean floor, comprising mainly of silica.
Fill in the blanks
Extrusive rocks are also known as ______ rocks.
Give reasons for the following
Silicates are the most common rock forming minerals.
Which Soils are formed by the weathering of metamorphic rocks?
What is thermal metamorphism?
Statement (1): Sedimentary rocks consist of many layers.
Statement (2): Sedimentary rocks are formed by the sediments deposited at different points of time.
Match the following.
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
