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Question
Distinguish between the following pair of terms associated with vulcanicity:
Fissure-type Volcanoes and Central-types Volcanoes
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Solution 1
| Fissure type Volcanoes | Central type Volcanoes |
| If the vent is of such type that eruption comes out through various holes in a line of long cracks it is called fissure type volcanoes. | If the vent is single and the magma erupting out takes the shape of a significant conical hill, it is known as central type volcanoes. |
Solution 2
Fissure type of volcanoes: A volcano is a vent in the earth’s crust out of which hot molten rocks (lava) flow. The hot rocks may also eject violently in the form of solid pieces. If the vent is in the form of a long crack then it is known as a Fissure Type Volcano. In this type volcanic activity occurs quietly the lava upwells silently and spreads over a large area giving rise to volcanic plateaux and extensive lava sheets.
Central-type Volcanoes: If the vent in the earth’s crust is of such type that the rock materials come out and mounds hills or cones are formed than the volcanoes formed are known as Volcanoes of the Central type. Vesuvius and Fuji Yama are the best examples of this type.
RELATED QUESTIONS
What is‘magma’?
What do you understand by ‘Crater of the Volcano’?
Distinguish between the following pair of terms associated with vulcanicity:
Crater and Caldera
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:
Some volcanoes erupt explosively.
Name one useful feature of vulcanicity other than soil fertility.
How the theory of plate tectonics has explained the formation of mountains like Himalaya or Alps and of the volcanic islands.
Explain three major zones of volcanic activities in the world.
Choose the odd one
Vesuvius, Stromboli, St.Helena, Etna.
