Podcast
Questions and Answers
What type of volcanic eruption is characterized by low viscosity and easy separation of volatiles from lava?
What type of volcanic eruption is characterized by low viscosity and easy separation of volatiles from lava?
- Phreatomagmatic eruption
- Plinian eruption
- Explosive eruption
- Effusive eruption (correct)
Which type of volcano is one that has not erupted in a long period but still has the potential to erupt again?
Which type of volcano is one that has not erupted in a long period but still has the potential to erupt again?
- Dormant volcano (correct)
- Active volcano
- Subaqueous volcano
- Extinct volcano
What is the term for the muddy volcanic debris that can form on the slopes of a volcano after heavy rain interacts with pyroclastic materials?
What is the term for the muddy volcanic debris that can form on the slopes of a volcano after heavy rain interacts with pyroclastic materials?
- Tephra
- Ash flow
- Lahar (correct)
- Tuff
What significant event occurred during the eruption of Vesuvius in 79 BC?
What significant event occurred during the eruption of Vesuvius in 79 BC?
What natural phenomenon can Plinian eruptions create, affecting the atmosphere around the volcano?
What natural phenomenon can Plinian eruptions create, affecting the atmosphere around the volcano?
Study Notes
Volcano Types
- Volcanoes are classified as active, dormant, or extinct.
Volcanic Eruptions
- The eruption of Mount Vesuvius in 79 BC destroyed Pompeii and Herculaneum.
- Pliny the Elder died from the gases released during the eruption of Mount Vesuvius.
- The first major explosion of Mount Pinatubo occurred on June 15, 1991.
Plinian Eruptions
- Plinian eruptions are characterized by the release of massive amounts of ash and gas.
- Mount Redoubt in Alaska erupted in 1989, producing a Plinian eruption.
- Plinian eruptions can create their own weather, such as rain of ash.
Lahars
- Volcanic debris, such as ash and mud, can become unstable on the slopes of volcanoes.
- This unstable material can flow downhill as a lahar.
Types of Eruptions
- Low-viscosity eruptions are peaceful and release volatiles easily.
- An example is the volcano in Surtsey, Iceland.
- High-viscosity eruptions are explosive and trap volatiles within the lava.
- An example is the volcano in Michoacan, Mexico.
Canada's Dormant Volcanoes
- There is increased seismic activity around the Nazko Cone in Canada.
- Mount Meager volcano in Canada erupted at the same magnitude as Mount St. Helens approximately 2,350 years ago.
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Description
Explore the fascinating world of volcanoes through this quiz, focusing on their classifications, types of eruptions, and notable historical events. Learn about active, dormant, and extinct volcanoes, as well as the impacts of explosive eruptions like those of Mount Vesuvius and Mount Pinatubo.
