December 16, 2013

shield volcano

Kilauea

thin, runny lava

Science Text book

lava flows out and hardens and builds up in layers

cinder cone volcano

it makes a cone shaped hill

cinder, ash and "bomb"s build up around the crater

probably has lava with lots of silica

Science Text book

December 16, 2013

composite volcano

sometimes quiet

sometimes lava flowssometimes there are violent eruptions

caldera

the huge hole left after the collapse of a volcano

Crater Lake, Oregon

December 16, 2013

volcanic neck

magma cools and hardens in a volcano vent

after everything else erodes this is left sticking out of the ground

dike

magma forces its way between rock layers

it cools and hardenssoil around it erodes

December 16, 2013

sill

magma that squeezes between horizontal layers of rock

intrusion

magma that cools and hardens underground

for example: dikes and sills

December 16, 2013

batholith

large amounts of magma cool underground

under the earth's crust