Q3 Exam 1
Last Modified: 2012-04-12
- Igneous Intrusive
- Mafic composition
form through the accumulation and compaction of sediment
- Rift Valleys
- Block Mountains (middle material falls down)
- Cascade mountains
- Ring of Fire (perimeter of Pacific)
- Aleutian Islands
- creates large & deep earthquakes
•High gas content
- lava flows - molten rock moves overground
- pyroclastic debris - fragments blown out of volcano
- volcanic gases - vapor & aerosols that exit a volcano
a highly heated mixture, largely of ash and pumice fragments, traveling down the flanks of a volcano or along the surface of the ground
Slopes of 2º-10º
Less explosive eruptions
Less viscous magma, flows easier
Shear or translational
Time gap between arrivals of P and S-waves:
- Animal behavior
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