I. They result in explosive eruptions.
II. They eject pyroclastic materials.
III. Pyroclastic materials and ashes accumulate near the vent, forming layers.
Select the correct answer using the code given below.
Composite Volcano Characteristics Explained
Composite volcanoes, also known as stratovolcanoes, are characterized by specific features related to their formation and eruptions. Let's analyze the given statements:
Statement I: Explosive Eruptions
Composite volcanoes often experience explosive eruptions. This is because their magma is typically viscous (thick), which traps gases. When pressure builds up, it results in violent eruptions.
Statement II: Ejection of Pyroclastic Materials
During these explosive eruptions, composite volcanoes eject significant amounts of pyroclastic materials. This includes ash, cinders, blocks, and bombs, which are fragments of rock and magma.
Statement III: Layered Accumulation
The ejected pyroclastic materials and ashes fall back to the Earth's surface. Over time, these materials cool and solidify, accumulating in layers near the volcanic vent. This process builds the characteristic steep, conical shape of composite volcanoes.
Conclusion
All three statements accurately describe key features associated with composite volcanoes:
- Statement I is correct.
- Statement II is correct.
- Statement III is correct.
Therefore, all statements I, II, and III are associated with composite volcanoes.
Important Questions from Major Domains of the Earth
- Various landforms observed on the surface of the earth are due to the:
1. differences in the type and structure of the crustal material
2. differences in the land forming processes
3. differential rates of the processes at different places on the Earth's surface
Select the correct answer using the code given below : Which of the following statements with regard to the continental shelf is NOT correct?
