Tectonics Flashcards
1
Q
What rock is oceanic plate made of?
A
Basalt
2
Q
What rock is continental plate made from?
A
Granite
3
Q
How thick is Basalt?
A
7km
4
Q
How thick is granite?
A
40km
5
Q
At O-O boundaries, what characteristics do volcanoes have?
A
- Low silica content
- Low viscosity
- Low gas content
- Effusive
6
Q
At O-O boundaries, what characteristics do volcanoes have?
A
- Low silica content
- Low viscosity
- Low gas content
- Effusive
7
Q
At O-C boundaries, what characteristics do volcanoes have?
A
- Mid silica content
- Mid viscosity
- Mid gas content
- Explosive
8
Q
At C-C boundaries, what characteristics do volcanoes have?
A
- High silica content
- High viscosity
- High gas content
- Very explosive
9
Q
Where has an O - O plate boundary?
A
Iceland 2010
10
Q
Where has an O - C plate boundary?
A
Mount St Helen’s - 1980
11
Q
Where has an C - C plate boundary?
A
Mount Pinatubo - 1991
12
Q
What percentage of earthquakes are on the ring of fire?
A
70%
