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प्रश्न
Distinguish between the following pair of terms associated with vulcanicity:
Acidic Lava and Basic Lava
उत्तर १
| Acidic Lava | Basic Lava |
| It is rich in silica and poor in iron and magnesium. | It is poor in silica and rich in iron and magnesium. |
उत्तर २
Acidic Lava and Basic lava
Acidic Lava :
- It is a highly viscous lava.
- It is light coloured like granite.
- It has a low density.
- It has a high percentage of silica.
- It flows slowly and results in steep-sided cones or lava domes.
Basic Lava :
- It is highly fine and thin.
- It is dark coloured like Basalt.
- It has a high density.
- It is poor in silica.
- It flows rapidly as thin sheets resulting in shield cones.
संबंधित प्रश्न
What are ‘Volcanoes’?
What is the following:
Spine or plug
Distinguish between the following pair of terms associated with vulcanicity:
Lava and Magma
Distinguish between the following pair of terms associated with vulcanicity:
Laccolith and Lapolith
Distinguish between the following pairs of terms associated with the crustal movement of the earth:
Tilted Block mountains and Lifted Block mountains
Match the items given in Column A with the correct ones in Column B.
| Column A | Column B |
| 1. A Rift valley lake | (a) Deccan Trap region of India |
| 2. A horst | (b) Fujiyama |
| 3. A basic lava sheet | (c) Tanganyika |
| 4. Composite cones | (d) Black forest plateau |
| 5. An active volcano | (e) Corndon Hill |
| 6. A Batholith | (f) The Alps |
| 7. A Phaccolith | (g) Upland of Britain is France |
| 8. A young Fold mountain | (h) Stromboli |
Answer the following:
Earthquakes are common in the belt of young fold mountains.
Distinguish between the following pairs of terms associated with vulcanicity:
Magma and Lava
How the theory of plate tectonics has explained the formation of mountains like Himalaya or Alps and of the volcanic islands.
Choose the odd one
Vesuvius, Stromboli, St.Helena, Etna.
