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- Geology Chapter 6 Flashcards | Quizlet
Which of the following factors determine whether a volcanic eruption will be explosive or non-explosive?
- Magma Composition | Physical Geography - Lumen Learning
One key to what makes the eruption unique is the chemical composition of the magma that feeds a volcano, which determines (1) the eruption style, (2) the type of volcanic cone that forms, and (3) the composition of rocks that are found at the volcano
- Which composition of magma causes the most explosive eruptions?
Among the various types of magma - ultramafic, mafic, intermediate, and felsic - it is the intermediate and felsic magmas that are known to cause the most explosive eruptions This occurs because felsic magmas have higher silica content, making them more viscous, which traps gases within the magma
- 4. 2: Magma Composition and Eruption Style - Geosciences LibreTexts
Eventually some part of the volcano will break and then all of that pent-up pressure will lead to an explosive eruption Mantle plume and spreading-ridge magmas tend to be consistently mafic, so effusive eruptions are the norm
- Why some volcanic eruptions are more explosive than others
Where tectonic plates come together, volcanoes often have thicker, viscous magma with high gas content This combination is explosive because the gases cannot easily boil out The gases remain trapped in the magma until the pressure in the magma no longer can hold them
- Explosive Eruptions - CK-12 Foundation
The type of eruption a volcano has depends on the composition of the magma Silica-rich, felsic magma can trap a lot of gas So these magmas produce explosive eruptions Silica-poor mafic magmas trap little gas These magmas produce quiet eruptions Which type of eruption do you think is safest to be near? Eruptions
- 4. 2 Magma Composition and Eruption Style – Physical Geology
Eventually some part of the volcano will break and then all of that pent-up pressure will lead to an explosive eruption Mantle plume and spreading-ridge magmas tend to be consistently mafic, so effusive eruptions are the norm
- Geology Chapter 5 Flashcards | Quizlet
Effusive eruptions involve the relatively gentle outpouring of lava, while explosive eruptions are characterized by violent bursts of ash, rock fragments, and gases
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