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Plutons

Magma

Tephra

Cones

Eruptions

Miscellaneous

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1-100 Large magma chambers that cool underground form these

1-100A What are batholiths?

1-200 Smaller versions of batholiths

1-200A What are stocks?

1-300 Small intrusive bodies oriented vertically, much like a dam

1-300A What are dikes?

1-400 These intrusive rock bodies form flat, horizontal structures

1-400A What are sills?

1-500 This structure has a “mushroom” shape to it.

1-500A What is a laccolith?

This magma is the mineralogical equivalent of the rock granite, and has the highest gas content.

2-100A What is rhyolitic magma?

2-200 Hawaiian volcanoes are made of this type of magma.

2-200A What is basaltic magma?

2-300 This magma is low in silica.

2-300A What is basaltic magma ?

2-400 This “intermediate” type of magma is formed when ocean plates subduct beneath continental rock.

2-400A What is andesitic magma?

2-500 This magma is high in silica, gas, and water.

2-500A What is rhyolitic magma ?

Tephra is classified by this.

3-100A What is size?

3-200 The smallest tephra is called this.

3-200A What is dust?

3-300 These “little stones” are ejected by eruptions of cinder cones.

3-300A What is lapilli?

3-400 The largest tephra may be angular in shape.

3-400A What are volcanic blocks?

3-500 Volcanic bombs may have this shape.

3-500A What is rounded or aerodynamic?

This is the smallest type of volcanic cone.

4-100A What is a cinder cone?

4-200 Mt. St. Helens is this volcanic type.

4-200A What is a composite cone?

4-300 This type of cone is the largest by mass and geographically.

4-300A What are shield volcanoes?

4-400 These “small” volcanoes have steeply-sloping sides.

4-400A What are cinder-cone volcanoes?

4-500 These “tourist” volcanoes contain magma that is low in silica and gases.

4-500A What are shield volcanoes?

This small tephra may pose hazards for aircrafts by clogging the engines.

5-100A What is volcanic ash?

5-200 Composite volcanoes have alternating eruptions of these two materials.

5-200A What is tephra and lava?

5-300 Flows of hot, poisonous gases from volcanoes that travel up to 125 km/hr.

5-300A What are Pyroclastic Flows?

5-400 Violent eruptions are more likely with magma with this type of viscosity.

5-400A What is high viscosity?

5-500 Melted glacial ice and tephra mudflows called this.

5-500A What are lahars?

These volcanic islands originate at a “hot spot”.

6-100A What is Hawaii?

6-200 This active Washington state volcano is the result of the subduction of the Juan de Fuca plate.

6-200A What is Mt. St. Helens?

6-300 Crater Lake in Oregon is famous for being this type of volcanic structure.

6-300A What is a caldera?

6-400 Ship-rock in New Mexico is an example of this.

6-400A What is a volcanic neck?

6-500 This type of lava flow wrinkles.

6-500A What is pahoehoe?

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

What are Nuée Ardantes?

Daily Double Round 1