Ch 6 Vocab Flashcards
A mixture of rock forming substances gases and water from the mantle
Magma
A mountain that forms in earths crust
Volcano
When magma reaches the surface it is called
Lava
A major belt of volcanoes around the Pacific Ocean
Ring of fire
Resulting volcanoes sometime create a string of islands called
Island arc
An area where material from deep within earths mantle rises through the crust and melts to form magma
Hot spot
Beneath a volcano magma collects in a
Magma chamber
A long tube that extends from earths crust up through the too of the volcano connecting the magma chamber to earths surface
Pipe
Molten rock and gas leave the volcano through an opening called a
Vent
The spread of lava as it pours out of a vent
Lava flow
A bowl shaped area that may form at the top of a volcano around the central vent
Crater
A material found in magma that forms from the elements oxygen and silicon
Silica
A mixture of hot gases ash cinders and bombs that flow down the sides of a volcano when it erupts explosively
Pyro clastic flow
The hole left when a volcano collapse
Caldera
Cone shaped hill or small mountain
Cinder cone
Tall cone shaped mountains in which layers of lava alternate with layers of ash
Composite volcano
Such lava flows slowly build a wide gently sloping mountain called
Sheiks volcano
Forms when magma hardens in a volcanos pipe and the surrounding rock later wears away
Volcanic neck
Magma that forces itself across layers and hardens into a
Dike
Magma that squeezes between horizontal rock layers hardens to form
Sill
A mass of rock formed when a large body of magma cools inside the crust
Batholith
