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प्रश्न
Explain the formation of sedimentary rocks on the basis of agents of formation.
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उत्तर
There are five main types of rocks on the basis of agents of formation:
- Riverine Rocks These are formed by the sediments deposited by running water or a river.
- Lacustrine Rocks These are formed by the deposition of silt, etc., on the bed of lakes.
- Glacial Rocks These are formed by the debris carried off and deposited by glaciers.
- Aeolian Rocks These are formed by the deposition of sand accumulation by the wind.
- Marine Rocks These are formed by the deposition of sediments at the ocean floor. These types are calcareous and carbonaceous sedimentary rocks.
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संबंधित प्रश्न
Discuss the importance of rocks for the construction business.
How are rocks different from minerals?
Name any three elements of the earth’s crust.
State the types of rocks for the formation of which the following process is involved.
Accumulation takes place over long periods of time in seas, lakes and streams.
How are igneous rocks classified on the basis of their chemical composition?
Differentiate between Rock and Mineral
What physical agents are involved in the sedimentary rocks?
Classify the following rock: Limestone
Give one word for the following.
The outer layer of the earth.
Give one term for the following statement:
Type of metamorphism in which changes are caused due to high pressure.
Give an example of a Plutonic rock.
Igneous rocks are called primary rocks.
Choose the incorrect statement from the following.
How are igneous rocks formed?
What are metamorphic rocks?
Explain the type of Igneous Rocks.
Minerals exist in nature ¡n the form of ______ or ______.
Why are crystalline rocks called so?
Match the following.
| Group A | Group B | ||
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
