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प्रश्न
Name different types of sedimentary rocks.
Name the three types of sedimentary rocks based on their formation.
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उत्तर
The three types of sedimentary rocks based on their formation are:
- Mechanically formed sedimentary rocks (clastic rocks) - formed by accumulation and compaction of sediments (e.g. sandstone, shale).
- Organically formed sedimentary rocks - formed from organic materials like remains of plants and animals (e.g. coal, limestone).
- Chemically formed sedimentary rocks - formed by precipitation of minerals from water (e.g. limestone, chert).
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संबंधित प्रश्न
Why is diamond clear and hard while graphite is soft?
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Gneiss
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Explain this term associated with rocks: Extrusive Igneous Rocks
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Decomposition of organic matter at different stages and over different periods of time.
What is metamorphism?
Classify the following rock: Slate
Fill in the blanks
______ rock contain a low percentage of silica and a high percentage of basic oxides.
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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 |
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What are the uses of soil?
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Why are crystalline rocks called so?
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 |
