primary hazards Flashcards
1
Q
name all of the primary tectonic hazards
A
- pyroclastic flows
- lava flows
- Ash + tephra fall
- toxic volcanic gases
2
Q
what is a pyroclastic flow?
A
a hot, fast moving collection of volcanic matter which rushes rapidly down.
3
Q
what is a lava flow?
A
outpourings of molten rock from a vent during an effusive volcanic eruption
4
Q
what is ash + tephra fall
A
Ash and Tephra is produced when rocks are violently ejected with massive force.
(ash = <2mm)
5
Q
what are toxic volcanic gases
A
carbon dioxide, sulfur dioxide dissolved within magma. as magma reaches surface, lower pressure causes gases to release
6
Q
A
