Which type of volcano is characterized by viscous, plug-like extrusions of lava?

Which type of volcano is characterized by viscous, plug-like extrusions of lava?

• A. Dormant Volcano
• B. Dome Volcano
• C. Caldera Volcano
• D. Shield Volcano

Answer: (B)

Dome volcanoes are characterized by the formation of viscous, plug-like extrusions of lava. This type of volcano typically results from the eruption of thick, slow-moving lava that piles up around the vent, creating a dome-shaped structure. The lava's high viscosity prevents it from flowing easily over long distances, which is why it builds up more vertically rather than spreading out like the more fluid lava from shield volcanoes. Dome volcanoes can produce significant eruptions, although they are often less explosive than other types. The accumulation of thick lava over time forms steep slopes and a distinctive dome profile. Understanding this process illustrates the dynamics of eruptive materials and how they lead to the unique shapes associated with different types of volcanoes.

Dome volcanoes are characterized by the formation of viscous, plug-like extrusions of lava. This type of volcano typically results from the eruption of thick, slow-moving lava that piles up around the vent, creating a dome-shaped structure. The lava's high viscosity prevents it from flowing easily over long distances, which is why it builds up more vertically rather than spreading out like the more fluid lava from shield volcanoes.

Dome volcanoes can produce significant eruptions, although they are often less explosive than other types. The accumulation of thick lava over time forms steep slopes and a distinctive dome profile. Understanding this process illustrates the dynamics of eruptive materials and how they lead to the unique shapes associated with different types of volcanoes.