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Question
What is the following:
Spine or plug
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Solution
The volcanic cone made by the quick solidification of viscous lava and having steep slopes is known as the spine or plug.
RELATED QUESTIONS
Give an example each of conical volcano and fissure volcano.
How are volcanoes formed?
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 erupt explosively.
Answer the following:
Earthquakes are common in the belt of young fold mountains.
Give reasons for the following:
Earth as a whole does not expand.
Name one useful feature of vulcanicity other than soil fertility.
Give one word for the following :
The region where there are highest number of geysers and hot springs.
The upper part of the earth’s crust ______.
