Volcano - is an opening in Earth's surface where molten rocks can escape from underneath., Dormant volcanoes - haven’t erupted in a long time, but they could again , Active Volcanoes - which are currently, or have recently erupted,  Extinct Volcanoes - have erupted for thousands of years and might be dead , Composite volcanoes - stratovolcanoes make up some of the world’s most memorable mountains,  Volcanic or lava domes - are created by small masses of lava which are too viscous (thick) to flow very far., Volcanic Eruptions - can be effusive, where lava flows like a thick , sticky liquid, or explosive, where fragmented lava explodes out of a vent. , Cinder cone volcanoes - are the simplest type of volcano that rarely grow larger than about 1,000 feet about., Shield volcanoes -  are large, broad volcanoes that look like shields from above, conduit system -  channels magma from deep within the Earth to the surface.,

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