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प्रश्न
What is the following:
Caldera
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उत्तर १
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.
उत्तर २
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.
संबंधित प्रश्न
What do you understand by ‘Crater of the Volcano’?
What is the following:
Spine or plug
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:
Hot springs are common in volcanic regions.
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.
Out of the following words write down the four that are connected with volcanic activity.
Karst, crater, drumlin, stalactites, gully, pot holes, ash, basalt, swallow holes, dyke, domes, bluffs.
Give one word for the following :
The region where there are highest number of geysers and hot springs.
______ belt is known as the “Ring of Fire”.
