Things That Come Out
This ejected material leaves the volcano as a lump of magma.
What are bombs?
Shiprock is this erosion-resistant part of an extinct volcano in New Mexico.
What is a conduit or pipe?
Mt. St. Helens, Mt. Hood, and Mt. Rainier are volcanoes that result from this type of plate boundary.
What is subduction?
The most commonly erupted type of magma.
What is basaltic?
The steep slopes of this volcanic structure is composed mostly of lapilli fragments.
What is a cinder cone?
What is water vapor?
The largest igneous intrusive structure, representing a region of cooled and hardened magma chambers.
What is a batholith?
Mt. Saint Helens, Mt. Hood, and Mt. Rainier are all examples of this type of volcano.
What is composite (or stratovolcano)?
The magma type associated with a divergent spreading ridge.
What is basaltic?
A branch formed off of the main conduit can lead to this type of vent, located on the side of the volcanic mountain.
What is a parasitic cone?
The type of volcano that is most likely to produce pyroclastic flows.
What is a composite (stratovolcano)?
Angular cracks in a rock unit allow magma to intrude upward to become this structure. If it cools and hardens underground, it becomes resistant to erosion.
What is a dike?
Mt. Kilauea is an example of this type of volcano.
What is a shield volcano?
The magma type associated with partial melting of the continental crust.
What is rhyolitic?
A horizontal layer of igneous rock formed when magma pushes its way between existing layers of rock.
What is a sill?
Smooth, ropy, basaltic lava.
What is pahoehoe?
A structure formed when a sill pools with magma near the surface.
What is a laccolith?
The cause of death for those trapped in the nearby city of Herculaneum when the Pompeii volcano erupted in Italy in 79 CE.
What is a pyroclastic flow?
What is incineration?
What is body fluid vaporization?
A chamber of magma that forms near the center of a tectonic plate can lead to this type of volcanic activity.
What are hot spots?
A violent eruption that empties a magma chamber can lead to the chamber collapsing, and the formation of a broad, depression in the landscape, referred to as this.
A depression caused by materials exploding out of a volcano.
What is a crater?
Most active volcanoes are located in this belt.
What is the Ring of Fire?
The addition of this substance at subduction zones lowers the melting point of rock, allowing continental material to form andesitic magma chambers.
What is water?
Massive, gently sloping volcanoes built of repeated basaltic lava flows.
What is a shield volcano?