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| Caldera Volcanoes |
Cone Volcanoes |
Lava Dome Volcanoes | Shield Volcano |
Strato Volcano |
| Cinder Cone Volcano |
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| Cinder cones are hills made up of rock fragments called cinders or scoria. These pieces of rock are a little like glass and have a lot of holes in them. The holes are made by gas bubbles in the lava before it cools. The rock fragments pile up into a cone shape and can be thousands of feet tall. |
| Spatter Rampart Volcano |
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| This cone is really a lava fountain. It erups from a long fissure that sends up hot lava in spatters. The sides of the fissure build up into ramparts. The spatter builds up layer on layer. Sometimes they form in a more circular cone shape. |
| Littoral Volcano |
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| When lava reaches the shore of the ocean or a lake it makes the water boil. This makes steam explode which throws small pieces of spatter lava, bombs, lapilli, ash, blocks, and other fragments. A cone forms from the layers of the eruption material. |