Definitions For Volcanos Flashcards
What is a volcano
An opening or vent in the earths surface through which molten material erupts and solidifies as lava
What is an active volcano
A volcano that is likely to erupt
What is a dormant volcano
Hasn’t erupted for many years
What is an extinct volcano
Hasn’t erupted for many thousands or millions of years
What are subduction volcanos
Located on converging, destructive plate margins
What are rift volcanos
Occur where tectonic plates diverge and magma spreads
What is a hotspot
Where plumes rise from the earth’s interior to penetrate the surface of the lithosphere, can occur away from margins
What is tephra
Rock fragments and particles ejected by a volcanos eruption
What are pyroclastic flows
A dense mass of ash, lava fragments and volcanic gas released from a volcano that flows at high speeds
What are lava flows
Molten rock
What are lahars -> mudflows
Mixture of volcanic material and mud, which reaches high temperatures
