Volcano Flashcards
1
Q
What is a Shield Volcano?
A
- Basaltic lava (hot)
- Silica poor
- Very runny
- Non explosive
2
Q
What is a Volcanic Dome?
A
- Silica rich (cool lava)
- Rhyolitic/Andesitic
- Not runny
- High peak
- Very explosive
- eg; mount st helens
3
Q
What is a Cinder-Cone Volcano?
A
- Pyroclastic materials
- Silica rich
- Steep sides
- explosive eruptions
- Very little lava is erupted
4
Q
What is a Stratovolcano?
A
- Has lava flows and pyroclastic eruptions.
- Intermediate between the shield volcano and the dome volcano
- Rhyolitic
5
Q
Caldera
A
- What is left after an eruption
- Volcano is not resupplied with more magma
6
Q
Mass extinction event
A
250 million years ago
7
Q
Pyroclastic Flows
A
Deadly ones
8
Q
Fissure eruptions
A
- Highly fluid
- Basaltic Lava
- Erupt from multiple spots
