Volcanic Hazards Flashcards
Continents melt if they pull apart or collide
Felsic Magma
Magma from the aesthenosphere erupts on the ocean floor
Mafic Magma
Old ocean floor melts when it is recycled
Intermediate
Where does mantle magma erupt?
Plate edges in the ocean
HOT SPOTS = isolated islands (Hawaii)
Where continents crack apart
Lava lakes erupt from cracks or fissures
FLOOD BASALTS
Broad Domes
Shield Volcanos
Steep cones made by lava fountains
SPLATTER CONES
What are some Mafic Eruption Hazards?
- Hot flows can burn down houses/forests
- Flood basalts have covered huge areas in the past.
Where do melted ocean floor erupt?
- ) Island Arcs
2. ) Volcanic Mountains (Andes)
What are Island arcs?
Volcanic chains (Japan) The ocean floor dives under another ocean
What do you get from Intermediate Eruptions?
Stratovolcanos - Eruption style unpredictable O_O
Eruptions range from small clouds to enormous explosions or nuee ardentes
Stratovolcanos
Can ash and lava erupt at the same time?
NO
What is the Final Caldera Collapse?
Where stratovolcanos can explode to a point of collapse
What color are Keek’s paw pads?
Pink
The volcano falls into its magma chamber, forming a huge….
Caldera
What are some hazards of intermediate magma?
Ashfall
Lahars
What are 3 bad things and 1 good thing about Ashfall?
- ) Suffocates organisms
- ) Collapses buildings
- ) Blocks out sunlight
- ) Fertilizes fields (N, K, and P)
What are some of Jackson’s nicknames?
Son Jack Creepy Stinky Vlacks
How many claws does Stewart have?
10
Ash and melted snow make mud-flows
Lahars
What are some of Stewarts’ nicknames?
Stewie
Wart
Sweaty
Where does a melted continent erupt?
Where continents collide and crack apart
Hot spots under continents
Sticky magma builds a plug that collapses as nuee ardentes
Lava Domes
Giant magma chambers over hot spots are emptied by roof collapse
Many states could be ash-covered, sunlight could be blocked for years
Supervolcano
Who is Julia’s Son?
Jackson
What are some Felsic Eruption Hazards?
Nuee Ardentes
Supervolcanos
Large cities can be wiped out in a few minutes by hot ash
Nuee Ardentes
What plate boundaries make mafic magma? Where else on Earth can mafic magma be found?
Magma from the aesthenosphere erupts on the ocean floor
What are the three ways that mafic magma can erupt?
Flood Basalts
Shield Volcanos
Splatter cones
What plate boundaries make intermediate magma?
Old ocean floor melts when it is recycled
What are the three ways intermediate magma can erupt?
Island Arcs
Volcanic Mountains
Final Caldera Collapse
What plate boundaries make felsic magma? Where else on Earth can felsic magma be found?
Continents melt if they pull apart or collide
What are the two ways that felsic magma can erupt? Risks?
Lava Domes , Supervolcanos
Risks:
Nuee Ardentes (large cities wiped out in a few minutes by hot ash)
Super Volcanos (many states could be ash-covered and sunlight could be blocked)
