a cone-shaped hill or mountain around this opening, built up of the material that is forced out.
Magma that reaches Earth's surface
A molten mixture of rock-forming substances, gases, and water from the mantle
A volcanic vent is an opening exposed on the earth's surface where volcanic material is emitted. All volcanoes contain a central vent underlying the summit crater of the volcano.
the pocket beneath a volcano where magma collects
Main Vent (volcano)
The main outlet for the magma to escape.
A bowl-shaped area that forms around a volcano's central opening
Additional openings that may form to release pressure caused by the magma chamber.
large blobs of magma that harden in the air
a cloud of ash that forms in the air after some volcanic eruptions
the flow of ash, cinders, bombs, and gases down the side of a volcano during an explosive eruption
a large crater caused by the violent explosion of a volcano that collapses into a depression
tall, cone-shaped mountains in which layers of lava alternate with layers of ash
cinder cone volcano
A steep, cone-shaped hill or small mountain made of volcanic ash, cinders, and bombs piled up around a volcano's opening
A low, flat, gently sloping volcano built from many flows of fluid, low-viscosity basaltic lava
Lava Dome Volcano
Lava is too thick to flow a great distance; Lava cools and piles up around the vent; As the dome continues to grow it spills loose fragments down the sides; Sometimes occur within craters of other volcanoes
A mass of rock formed when a large body of magma cools inside the crust
Relatively small, mushroom-shaped pluton that forms when magma intrudes into parallel rock layers close to Earth's surface.
sheetlike intrusions that are oriented parallel to previous rock units
The region where oceanic plates sink down into the asthenosphere creating volcanoes.
tectonic plates that are spreading apart causing volcanoes to form.
hot spot volcanoes
• A hot spot is an area where material from deep in the mantle rises and then melts, forming magma