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Question
Distinguish between the following pair of terms associated with vulcanicity:
Acidic Lava and Basic Lava
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Solution 1
| 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. |
Solution 2
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.
RELATED QUESTIONS
What are ‘Volcanoes’?
What is the following:
Caldera
What is the following:
Mud volcanoes
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 |
Give reasons for the following:
Earth’s movements have modified the Earth’s surface.
Give reasons for the following:
Earth as a whole does not expand.
What are tectonic movements? How are these classified?
How the theory of plate tectonics has explained the formation of mountains like Himalaya or Alps and of the volcanic islands.
Assertion (A): The Pacific Ocean includes two thirds of the world’s volcanoes.
Reason (R): The boundary along the Eastern and Western coast areas of the Pacific Ocean is known as the Pacific Ring of Fire.
How many major zones of volcanic activities in the world?
