Concept explainers
The type of volcano produces the most violent eruptions and quietest eruption.
Answer to Problem 3TE
The Shield volcanoes produce the quietest eruptions and the Cinder cone and Composite volcanoes produce explosive or violent eruptions.
Explanation of Solution
The primary determinants of the type of volcanic eruption are the magma’s viscosity, degree of liquidity and gas content. The magma is more thick and viscous in volcanoes generating explosive eruptions. They also have a greater volume of gas. These stickers magmas prevent gas bubbles from expanding, resulting in the pressure build-up that leads to explosive eruptions.
In contrast, gases can easily escape from thin, runny magma, so pressure build-up is minimal. Factors that contribute to the viscosity of the magma include temperature and amount of silica in the lava.
Conclusion:
Therefore, the Shield volcanoes produce the quietest eruptions and the Cinder cone and Composite volcanoes produce explosive or violent eruptions.
Chapter 25 Solutions
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