W1 Flashcards
The solid rocks blown from the vent are called
pyroclastic debris
It is believed to be responsible for the existence of islands in Japan million years ago.
Subduction
It is believed to be responsible for the existence of islands in Japan million years ago.
Subduction
It is dependent on the plates which form the top layer of the mantle.
Subduction
It is caused by a hot spot near the Earth’s outer core.
Distension
It is a region of high volcanic activity not located at any plate boundary.
hotspot
It is contained inside a chamber located inside a mantle.
Magma
It is characterized by numerous and threatening eruptions due to a very active geological process inside a mantle.
Young volcano
What is the most active volcano in the world? It is also Hawaii’s youngest volcano.
Kilauea
A volcano is said to be ____ if it is currently erupting or show signs of unrest activities such as significant amount of gas emission or frequent seismic activities.
Active
It is characterized by the emission of acid gases and vapors.
fumarolic stage
It is ____ if the last traces of volcanic heat disappear and if it has not erupted in 2,000 years.
Inactive or dormant
When volcanoes exceeeded a period of dormancy of at least 10,000 years and are not expected to erupt , they are classified as _______.
Extinct volcanoes
It is the simplest type of volcano in the world
Cinder Cones
Cinder Cones are also called
scoria cone
It is a steep conical hill formed above the a vent that is composed mostly of basalt.
Cinder Cones
Composite volcano is also called
Stratovolcano
It is one constructed of alternating layers of pyroclastic materials and solidified lava flows.
Composite volcano
Its conduit system contains a central or clustered group of vents.
Composite Volcano
What is the highest peak in the Western Hemisphere?
Aconcagua
It is a broad, gently sloping landform that is built by many layers of low-viscous lava flows which cannot be filed up into steep mounds.
Shield volcano
Eruptins of this type are relatively non-violent which can be attributed to the fluidity of the basalt lava ejected from the vent.
Shield Volcano
Whta is the largest shield volcano and also one of the world’s most active volcanoes?
Mauna Loa
Volcanic Dome is also called
Lava dome
It is a round, steep-sided mound that is formed by small, bulging masses of lava primarily composed of either dacite or rhyolite.
Volcanic Dome
It is described to produce the largest eruptions on Earth.
Supervolcano
It implies a volcanic center that has recorded an eruption with a magnitude of 8 on the Volcano Explosivity Index
Supervolcano
Who created VEI scale
Christopher G. Newhall of the United States Geological Survey, and Stephen Self at the University of Hawaii.
Geologist compare the bulk density of the distributed tephra with the bulk density of the rock that composes tephra. This result is called the
dense rock equivalent/ DRE
This type of volcano is created when magma erupts in the underwater fissures of the Earth.
Submarine Volcanoes
Submarine Volcanoes in shallow water can eject basaltic magma and the lava is formed is known as
pillow lava
Subglacial volcano is also called
Glaciovolcano
It is created by eruptions beneath the surface of a glacier or sheets which is then melted into a lake by the rising lava that resembles to the pillow lava formed by submarine volcanoes.
Subglacial Volcanoes
Subglacial eruptions often cause?
jokulhlaups or great floods of water
-non-explosive eruptions,
fluid basaltic lava, gentle
broad slopes.
Shield Volcanoes
-over multiple eruptions, long, fluid lava flows from broad layers, which accumulate into some of the world’s largest volcanoes.
Shield Volcanoes
explosive eruptions, small but steep slopes, pyroclastics.
Cinder Cones
Forms when explosive activity throws magma into the air which cools into cinders and settles around the volcano’s opening.
Cinder Cones
These emerge in just a few years during one active period; afterward, they are usually extinct, but they may
occur on the side of a larger volcano.
Cinder Cones
Alternating between lava and pyroclastics, explosive and non-explosive eruptions, steep and tall.
Composite Volcano
Over multiple eruptions, the accumulation of both explosive activity and lava flows form the steep, sweeping sides of this volcano.
Composite Volcano
As it ages, multiple channels to the surface can splinter off of the central vent, influencing its shape
Composite Volcano
