the pocket beneath a volcano where magma collects
A long tube through which magma moves from the magma chamber to Earth's surface
The opening through which molten rock and gas leave a volcano
The area convered by lava as it pours out of a volcano's vent
A bowl-shaped area that forms around a volcano's central opening
A material that is formed from the elements oxygen and silicon
A hot, fast moving type of lava that hardens to form smooth, rope-like coils
A slow moving type of lava that hardens to form rough chunks; cooler than pahoehoe
The expulsion of ash, cinders, bombs, and gases during an explosive volcanic eruption
said of a volcano that is erupting or has shown signs of erupting in the near future
said of a volcano that does not show signs of erupting in the near future
said of a volcano that is unlikely to erupt again
A pool formed by groundwater that has risen to the surface after being heated by a near-by body of magma.
A fountain of water and steam that builds up pressure underground and erupts at regular intervals.
Energy from water or steam that has been heated by magma.
A weak spot in the crust where magma has come to the surface.
The molten mixture of rock-forming substances, gases, and water from the mantle.
Liquid magma that reaches the surface
Ring of Fire
A major belt of volcanoes that rims the Pacific Ocean.
A string of islands formed by the volcanoes along a deep ocean trench.
An area where magma from deep within the mantle melts through the crust above it.
A wide, gently sloping mountain made of layers of lava and formed by quiet eruptions.
A steep, cone-shaped hill or mountain made of volcanic ash, cinders, and bombs piled up around a volcano's opening.
A tall, cone shaped mountain in which layers of lava alternate with layers of ash and other volcanic materials.
The large hole at the top of a volcano formed when the roof of a volcano's magma chamber collapses.
A deposit of hardened magma in a volcano's pipe.
A slab of volcanic rock formed when magma forces itself across rock layers.
A slab of volcanic rock formed when magma squeezes between layers of rock.
A mass of rock formed when a large body of magma cooled inside the crust.