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प्रश्न
What is sills?
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उत्तर
Sills are horizontal intrusions of magma that have forced their way between layers of existing rock and solidified there. Unlike dykes, which cut vertically across rock layers, sills lie parallel to the bedding planes. When the magma cools and hardens in these horizontal cracks, it forms a flat, sheet-like body of igneous rock.
संबंधित प्रश्न
Rocks and minerals play a very important role in our lives.
Can you imagine modern life without minerals?
Rocks and minerals play a very important role in our lives.
What problems would you face in their absence?
Fill in the blank
Granite is an example of intrusive ________ rocks.
Classify the following rocks by selecting the correct option given below:
sandstone
What are metamorphic rocks?
Explain this term associated with rocks: Laccoliths and Batholiths
What is meant by a rock?
What is meant by the term ‘metamorphism’?
Classify the following rock: Clay
Classify the following rock: Dolomite
Classify the following rock: Limestone
Give one word for the following.
Igneous rocks, which contain a high percentage of silica.
Give one term for the following statement:
Igneous rocks of deep seated origin.
Give one term for the following statement:
Fine grained metamorphic rock, generally produced by the low grade metamorphism of shale.
Which of the following monuments are built-in igneous rock?
- The Taj Mahal
- Fort Raigad
- The Red Fort
- Ellora Sculpture
Choose the incorrect statement from the following.
What are fossils?
| A | B | ||
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
Match the following.
| A. | Granite | 1. | Bed rock |
| B. | Soil layer | 2. | Plutonic rock |
| C. |
Barren island |
3. | Strip farming |
| D. | Soil conservation | 4. | Active Volcano |
Statement (1): Sedimentary rocks consist of many layers.
Statement (2): Sedimentary rocks are formed by the sediments deposited at different points of time.
