quarter 3 volcanoes Flashcards
it is also referred to as
the Circum-Pacific Belt, is a path
along the Pacific Ocean characterized
by active volcanoes and frequent
earthquakes. Its length is
approximately 40,000 kilometers
(24,900 miles)
the Ring of Fire,
the simplest type
of volcano. They are built from
particles and blobs of congealed lava
ejected from a single vent. As the gascharged lava is blown violently into
the air, it breaks into small fragments
that solidify and fall
as cinders around the vent to form a
circular or oval cone.
Cinder cone volcano
it is a type
of volcano usually composed almost
entirely of fluid lava flows. It is named
for its low profile, resembling a
warrior’s shield lying on the ground.
shield volcano
it is also called
stratovolcanoes, are cone
shaped volcanoes built from many
layers of lava, pumice, ash, and
tephra. Because they are built of
layers of viscous material, rather than
fluid lava, composite volcanoes tend
to form tall peaks rather than
rounded cones.
composite volcano
it is an active
volcano that is not erupting, but
supposed to erupt again. An
extinct volcano has not had an
eruption for at least 10,000 years and
is not expected to erupt again in a
comparable time scale of the future.
dormant volcano
volcanoes are those which
have not erupted in human history.
Examples of extinct volcanoes
are Mount Thielsen in Oregon in the
US and Mount Slemish in Co. Antrim.
EXTINCT VOLCANOES
eruptions also called surtseyan, are explosive eruptions that occurs when water interacts with magma and violenty burst into steam and volume ash
PHREATOMAGMATIC
eruptions occur when water is heated even without contact with magma, and erupts as mixure of hot water and steam. A common example occus when geysers
PHREATIC
eruptions are effusive quiet eruptions that produce large volumes of very hot, thin . runny lava and extrudes via fissures
ICELANDIC
eruptions are series of discrete,loud eruptions and throat clearing, canon like explosion that shoots high velocity blocks,a nd bombs
VULCANIAN
it is also known as nuee ardente eruptions, occur when large amount of thepra,gas, and lava erupted laterally from the crater, producing glowing avalanches.
PELEAN
eruptions are very large, explosive eruptions that involves very viscous magma and priduce very large volume of ash and thepra that can cover a very wild area
plinian
eruptions are similar with icelandic eruptions, effusive eruptions of large volumes of very hot, thin , runny lava but originates from vents of the volcanoes
hawaiian
eruptions are more explosive eruptions that shoot thicker lava along with the burst of steam, gas and ash that spatterns molten lava
strombolian
