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Question
What is the following:
Caldera
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Solution 1
Caldera is the spacious crater of a volcano created by tremendous eruption. Crater lake in Oregon U.S.A occupies a caldera about 9 kilometers in diameter.
Solution 2
Caldera: In some volcanoes, the summit of the volcano blows up during a violent explosion resulting in the formation of a large depression called a Caldera. Some calderas may have been formed by the collapse of the summit portion. Calderas are occupied by large lakes. The lake in the caldera is called the crater lake. In the state of Oregon in the United States, there is a caldera which is about 9 km in diameter.
RELATED QUESTIONS
How are volcanoes formed?
What is the following:
Fissure type of volcanoes
Distinguish between the following pair of terms associated with vulcanicity:
Geysers and Hot Springs
Distinguish between the following pairs of terms associated with the crustal movement of the earth:
Graben and Horst
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 develop parasitic cones.
Answer the following
The vent of a volcano when blocked results in an explosive eruption.
Give reasons for the following:
Earth’s movements have modified the Earth’s surface.
Give one word for the following :
The region where there are highest number of geysers and hot springs.
How the theory of plate tectonics has explained the formation of mountains like Himalaya or Alps and of the volcanic islands.
