Types of Volcanoes
A small, steep volcano made mostly of pyroclastic material.
Cinder Cone
The ability of magma or lava to resist flowing.
Viscosity
Hot ash, gas, and rock moving extremely fast down a volcano.
Pyroclastic Flow
A bowl-shaped opening at the top of a volcano.
Crater
jagged texture and has high viscosity
A'a
A wide volcano with gently sloping sides formed by non-explosive eruptions.
Shield Volcano
Lava that is smooth and ropey when cooled.
Pahoehoe
Mud formed when snow or ice melts during a volcanic eruption.
Mudflow (Lahar)
A very large pit formed by an eruption or collapse.
Caldera
A volcano that is not erupting now but may erupt again.
Dormant
made of pyroclastic materials and is a small and short-lived volcano
Cinder Cone Volcano
Lava that is thick, sticky, and resists flowing easily
High Viscosity
Large chunks of magma launched into the air that harden as they fall.
Volcanic Bombs
The opening where magma reaches Earth’s surface.
Vent
A volcano that has not erupted in recorded history and is unlikely to erupt again.
Extinct
A volcano that forms from repeated lava flows spreading over a large area.
Lava Plateau
Lava that cools into rough, jagged chunks.
Blocky
A violent eruption of volcanic material into the air.
Explosive
Hardened lava, ash, and rock ejected during an eruption.
Pyroclastic Material
A volcano that has erupted recently.
Active
A volcano built from layers of ash, lava, and rock. (Pyroclastic Materials)
Composite Volcano
Low viscosity has ropey features
Pahoehoe
A slow eruption where lava flows steadily from a volcano.
Nonexplosive
created from layers of cooled lava
Lava Plateau
lava that has cooled underwater in round formations
Pillow