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Plutons

Magma

Tephra

Cones

Eruptions

Miscellaneous

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Plutons TephraMagma Cones Eruptions Misc.

1-1001 - 100

Large magma chambers that cool underground form

these

1-100A1 - 100

What are batholiths?

1-200

Smaller versions of batholiths

1-200A1 - 100

What are stocks?

1-300

Small intrusive bodies oriented

vertically, much like a dam

1-300A1 - 100

What are dikes?

1-400

These intrusive rock bodies form flat,

horizontal structures

1-400A1 - 100

What are sills?

1-500

This structure has a “mushroom” shape

to it.

1-500A1 - 100

What is a laccolith?

2-1001 - 100

This magma is the mineralogical

equivalent of the rock granite, and has the highest gas content.

2-100A1 - 100

What is rhyolitic magma?

2-200

Hawaiian volcanoes are made of this type

of magma.

2-200A1 - 100

What is basaltic magma?

2-300

This magma is low in silica.

2-300A1 - 100

What is basaltic magma ?

2-400

This “intermediate” type of magma is

formed when ocean plates subduct

beneath continental rock.

2-400A1 - 100

What is andesitic magma?

2-500

This magma is high in silica, gas, and water.

2-500A1 - 100

What is rhyolitic magma ?

3-1001 - 100

Tephra is classified by this.

3-100A1 - 100

What is size?

3-200

The smallest tephra is called this.

3-200A1 - 100

What is dust?

3-300

These “little stones” are ejected by eruptions of

cinder cones.

3-300A1 - 100

What is lapilli?

3-400

The largest tephra may be angular in

shape.

3-400A1 - 100

What are volcanic blocks?

3-500

Volcanic bombs may have this shape.

3-500A1 - 100

What is rounded or aerodynamic?

4-1001 - 100

This is the smallest type of volcanic cone.

4-100A1 - 100

What is a cinder cone?

4-200

Mt. St. Helens is this volcanic type.

4-200A1 - 100

What is a composite cone?

4-300

This type of cone is the largest by mass and geographically.

4-300A1 - 100

What are shield volcanoes?

4-400

These “small” volcanoes have

steeply-sloping sides.

4-400A1 - 100

What are cinder-cone volcanoes?

4-500

These “tourist” volcanoes contain

magma that is low in silica and gases.

4-500A1 - 100

What are shield volcanoes?

5-1001 - 100

This small tephra may pose hazards for aircrafts by clogging

the engines.

5-100A1 - 100

What is volcanic ash?

5-200

Composite volcanoes have alternating

eruptions of these two materials.

5-200A1 - 100

What is tephra and lava?

5-300

Flows of hot, poisonous gases from volcanoes that travel up to

125 km/hr.

5-300A1 - 100

What are Pyroclastic Flows?

5-400

Violent eruptions are more likely with magma

with this type of viscosity.

5-400A1 - 100

What is high viscosity?

5-500

Melted glacial ice and tephra mudflows

called this.

5-500A1 - 100

What are lahars?

6-1001 - 100

These volcanic islands originate at a

“hot spot”.

6-100A1 - 100

What is Hawaii?

6-200

This active Washington state volcano is the

result of the subduction of the Juan de Fuca

plate.

6-200A1 - 100

What is

Mt. St. Helens?

6-300

Crater Lake in Oregon is famous for being this

type of volcanic structure.

6-300A1 - 100

What is a caldera?

6-400

Ship-rock in New Mexico is an example

of this.

6-400A1 - 100

What is a volcanic neck?

6-500

This type of lava flow wrinkles.

6-500A1 - 100

What is pahoehoe?

This is the other name for a pyroclastic flow composed of hot gas

and ash.

What are

Nuée Ardantes?