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प्रश्न
Name the types Sedimentary rocks based on 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 on 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
What is crust?
Classify the following rocks by selecting the correct option given below:
basalt
Classify the following rocks by selecting the correct option given below:
schist
How are sedimentary rocks formed?
With the help of your teacher, collect different types of rocks such as granite, sandstone, limestone, marble, slate, graphite, etc. and prepare a chart containing information about their colour, hardness, texture, and permeability.
Distinguish between the following pair:
Degradation and aggradation
Distinguish between the following:
Sills and Dykes.
State the chief characteristics of metamorphic rocks.
How are rocks important to us?
Classify the following rock: Clay
Classify the following rock: Gneiss
Give one word for the following.
Stratified rock formed organically but from vegetative matter-swamps and forests.
Why fossils are preserved in Sedimentary and not in Igneous rocks?
Give reasons for the following
Rocks are of great economic significance.
Igneous rocks are called primary rocks.
Distinguish between Metamorphic rock and sedimentary rock.
Match the following:
| (a) | Igneous | (i) | Magma |
| (b) | Sedimentary | (ii) | Transformation |
| (c) | Metamorphic | (iii) | Gypsum |
| (d) | Molten material | (iv) | Basalt |
| (e) | Rock Cycle | (v) | Marble |
What are fossils?
Match the following:
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
Match the following.
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
