Impacts of volcanic activity Flashcards
1
Q
What is tephra?
A
a solid material of varying grain size ranging from volcanic bombs to ash, ejected into the atmosphere
2
Q
What are pyroclastic flows?
A
- very hot (over 800 degrees)
- gas charged
- high velocity flows
- made up of gas&tephra
- hug the ground
- flow downhill
- speeds of up to 700km/h
3
Q
What are volcanic gases?
A
- carbon dioxide
- carbon monoxide
- hydrogen sulphide
- sulphur dioxide
- chlorine
4
Q
What are lahars?
A
- melted snow and ice combined with volcanic ash
- high speeds
