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Exam 2
Natural Disasters
42
Geology
Undergraduate 2
10/20/2014

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Term
Low silica, high iron, magmas will:
Definition
have a low viscosity
Term
High-silica magmas are typical of volcanoes located near:
Definition
subduction zones.
Term
A volcano composed of both lava and pyroclastics (ash and pumice) would be a:
Definition
composite volcanoes
Term
Which is characteristic of convergent plate boundaries?
Definition
Composite volcanoes
Term
Flood basalts are formed by:
Definition
low viscosity magma
Term
A thick viscous magma is most likely to erupt in what way?
Definition
Vesuvian
Term
Large, relatively flat volcanoes such as those on Hawaii are called:
Definition
shield volcanoes
Term
Explosive eruptions are characteristic of
Definition
high viscosity magmas
Term
Stacks of fluid lava flows covering vast areas of land are the result of
Definition
flood basalts
Term
A phreatic eruption produces
Definition
mostly gas
Term
Magmas erupted at mid-ocean ridges
Definition
. are from the upper mantle
Term
An eruption featuring both fluid lava and coarse pyroclastics (cinders) would be
Definition
strombolian
Term
A magma rich in silica and dissolved gases is most likely to erupt in what way?
Definition
Vesuvian
Term
Basaltic magmas will likely produce
Definition
fluid lava flows
Term
A very fast moving turbulent mixture of hot volcanic debris and volcanic gases is a
Definition
pyroclasitic flow
Term
Tsunamis can be caused by
Definition
caldera collapse
Term
Acid rain and acid lakes are the result of
Definition
volcanic gases.
Term
Vast amounts of ash in the stratosphere will
Definition
lower global temperatures
Term
Caldera are formed when
Definition
the roof of an empty magma chamber collapses.
Term
Glacier bursts, or Jokulhlaups, occur
Definition
. shield volcanoes
Term
Pyroclastic flows are produced by
Definition
. silica rich magmas
Term
The volcanic hazard that can effect areas farthest from the volcano is
Definition
a lahar
Term
The Hawaiian volcanoes lie above a
Definition
mantle hot spot
Term
Which of the following is NOT an event that can be used to predict a major eruption?
Definition
Tsunamis
Term
The 1902 eruption of Mt.Pelee destroyed St. Pierre with
Definition
pyroclastic flows
Term
The sea-level eruption of Krakatau in 1883 produced immense
Definition
tsunamis
Term
During the eruption of Vesuvius, the people of Pompeii seem to have been overcome by
Definition
ash falls.
Term
The most noteworthy feature of the 1973 Heimaey eruption was the effort to divert
Definition
lava flows
Term
The first event in the big 1980 eruption of Mt St Helens was a
Definition
landslide
Term
The Mt St Helens eruption destroyed trees up to 20 km away with its
Definition
blast wave
Term
Mt. Pelee on the island of Martinique lies above a
Definition
subduction zone.
Term
Long after the eruption of Mt. Pinatubo, the surrounding area continued to be threatened with
Definition
lahars
Term
The eruptions of Paricutin and Heimaey were both preceded by
Definition
many small earthquakes
Term
The eruption of lava flows at Kilauea, Hawaii have caused
Definition
extensive destruction to homes
Term
Vesuvius, Santorini and Tambora are all
Definition
composite volcanoes
Term
The eruptions of the Mexican volcano Paricutin were
Definition
Strombolian.
Term
The major hazard in the continuing eruption of Kilauea, Hawaii is
Definition
lava flows
Term
A major cause of death from the large eruptions of Laki on Iceland was
Definition
toxic gases
Term
The eruptions of lava flows on Iceland are associated with a
Definition
divergent plate boundary
Term
Most fatalities from the Tambora eruption were victims of
Definition
starvation
Term
A lesson learned from Mt. Saint Helens that was applied to Mt. Pinatubo was
Definition
to evacuate a large area surrounding the volcano
Term
Some buildings in Hawaii have been saved by
Definition
moving them out of harms way.
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