Profile resembles a warrior’s shield lying on the ground Formed by thick lava flows that flow slowly, not explosive Largest volcanoes are shield Examples: Mauna Loa on the Big Island of Hawaii Galapagos Islands

Large symmetrical cones Built by alternating layers of lava flows, volcanic ash, cinders, and bombs. Can create explosive eruptions Examples: Mount Fuji in Japan Mt. Hood, Mt. St. Helens, and Mt. Rainier in the U.S.

Lava is too thick to flow a great distance Lava cools and piles up around the vent. As the dome continues to grow it spills loose fragments down the sides. Sometimes occur within craters of other volcanoes Mt Pelee Lassen Peak in California

Magma can reach the surface in other areas.

Molten rock UNDER the earth’s surface.

Molten rock ABOVE the earth’s surface.

An oceanic crust slides under another oceanic crust

Regions of the mantle that are very hot compared to the surrounding mantle.

Large underground pool of molten rock sitting underneath the Earth’s crust.

Subterranean geological structures formed by the violent eruption of deep-origin volcanoes

The weak point in the Earth’s crust where hot magma rises from the magma chamber and reaches the surface.

Fast-moving current of hot gas and rock that moves away from a volcano.

A large basin-like depression resulting from the explosion or collapse of the center of a volcano.

A column of solidified lava or igneous rock formed in a volcanic vent.

Intrusions form when magma cools and solidifies beneath the surface.

Where two plates meet and one goes under

Rift Valleys form on land when two continental plates diverge.

Where divergent boundaries can occur

Small pieces of pulverized rock, minerals, and volcanic glass created during eruption.

Large projectiles thrown through the air.

Quiet now, but might erupt again

Lava builds up here in the shape of a cone.

Small pieces of pulverized rock, minerals, and volcanic glass created during eruption.

The theory that Earth's outer crust is divided into several plates that glide over the plastic-like and less ridged asthenosphere.

Small cones-shaped volcanoes with steep angled sides Blobs of lava spew into the air during eruptions and fall as cinders on the sides of the volcano Built over a short period of time Examples: Paricutin in Mexico Sunset Crater in Arizona

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Volcano Vocab

Question	Answer
Shield Volcano	Profile resembles a warrior’s shield lying on the ground Formed by thick lava flows that flow slowly, not explosive Largest volcanoes are shield Examples: Mauna Loa on the Big Island of Hawaii Galapagos Islands
Composite Volcano	Large symmetrical cones Built by alternating layers of lava flows, volcanic ash, cinders, and bombs. Can create explosive eruptions Examples: Mount Fuji in Japan Mt. Hood, Mt. St. Helens, and Mt. Rainier in the U.S.
Lava Dome Volcano	Lava is too thick to flow a great distance Lava cools and piles up around the vent. As the dome continues to grow it spills loose fragments down the sides. Sometimes occur within craters of other volcanoes Mt Pelee Lassen Peak in California
Secondary Vent	Magma can reach the surface in other areas.
Magma	Molten rock UNDER the earth’s surface.
Lava	Molten rock ABOVE the earth’s surface.
Ring of Fire	An active volcanic region
Island Arc	An oceanic crust slides under another oceanic crust
Hot Spot	Regions of the mantle that are very hot compared to the surrounding mantle.
Magma Chamber	Large underground pool of molten rock sitting underneath the Earth’s crust.
Volcanic Pipe	Subterranean geological structures formed by the violent eruption of deep-origin volcanoes
Main Vent	The weak point in the Earth’s crust where hot magma rises from the magma chamber and reaches the surface.
Crater	Circular basin or depression.
Pyroclastic Flow	Fast-moving current of hot gas and rock that moves away from a volcano.
Caldera	A large basin-like depression resulting from the explosion or collapse of the center of a volcano.
Volcanic Neck	A column of solidified lava or igneous rock formed in a volcanic vent.
Igneous Intrusion	Intrusions form when magma cools and solidifies beneath the surface.
Subduction Zone	Where two plates meet and one goes under
Dike	Vertical Instrusions
Sill	Horizontal Intrusions
Rift Valley	Rift Valleys form on land when two continental plates diverge.
Mid-Ocean Ridge	Where divergent boundaries can occur
Volcanic Ash	Small pieces of pulverized rock, minerals, and volcanic glass created during eruption.
Volcanic Bomb	Large projectiles thrown through the air.
Dormant Volcano	Quiet now, but might erupt again
Extinct Volcano	Unlikely to erupt again
Secondary Cone	Lava builds up here in the shape of a cone.
Ash Cloud	Small pieces of pulverized rock, minerals, and volcanic glass created during eruption.
Plate Tectonics	The theory that Earth's outer crust is divided into several plates that glide over the plastic-like and less ridged asthenosphere.
Cinder Cone Volcano	Small cones-shaped volcanoes with steep angled sides Blobs of lava spew into the air during eruptions and fall as cinders on the sides of the volcano Built over a short period of time Examples: Paricutin in Mexico Sunset Crater in Arizona

Created by: hannah990

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