Volcano type and frequency
Terms in this set (18)
a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt
A volcano that has not erupted for thousands of years and probably will not erupt again.
a volcano that has erupted in historical times, but is now quiet
One that is erupting or shows signs that it may erupt in the near future.
the volcano expels hot coulds of gas and dust high into the atmostphere; usually quite violent
Quiet, fluid basaltic lava flows (low viscosity magma, least explosive), VEI 0-1
A volcano that produces a fountain of lava that runs down the sides. Not considered very dangerous.
low silica, flows easily
The lava that is richest in silica, making it the stickiest and least fluid kind of lava. It erupts at temperatures of only 600 to 800 C.
Volcano explosivity Index
A scale that measures the explosive energy of the volcano.
Plume <100m, <10,000m3 erupted
Plume >50km, >1,000km3 erupted
direct result of eruption; lava flows, pyroclastic activity, ash fall, ash flows, release of gas
caused by the primary hazard; a direct result of eruption; debris flow, mudflow, landslides, floods, fire
an avalanche of volcanic water and mud down the slopes of a volcano
an avalanche of glowing rocks flowing on a cushion of hot gases
The deposition of a layer of fine airborne rock and glass that have been erupted from a volcano
bits of rock or solidified lava dropped from the air during an explosive volcanic eruption; ranges in size from volcanic ash to volcanic bombs and blocks
YOU MIGHT ALSO LIKE...
FDSCI 201 Exam 2: Volcanoes
Environmental Geology | Chapter 8
OTHER SETS BY THIS CREATOR
Newcastle Grainger Town Regeneration project
Newcastle Counter urbanisation and Urban Sprawl
Newcastle upon Tyne Urban Challenges
Newcastle Urban Opportunities
THIS SET IS OFTEN IN FOLDERS WITH...
Plate Margins and landforms
Hot spots and supervolcanoes
Evidence for plate tectonics