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| A lava dome constructed from thin basaltic lava that spreads widely due to copious and frequent eruptions. tens of kilometers in circumference, gentle slope. Mauna Loa |
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| Felsic lava so resistant to flow that it bubbles ad creates a steep dome. Mt. St. Helens |
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| Ejected pyroclast accumulate, the profile of the cone is determine d by the maximum angle at which the pyroclast resist sliding. Classic common shape. |
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| A combination of beds of pyroclast and flows of lava comprise a concave shaped composite volcano. Common above subduction zones. |
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| bowl-shaped pit centered over the main vent. (m) |
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| over accumulation magma causes the roof of the magma chamber to claps creating a large steep walled basin. (km) |
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| A central vent filled with settling volcanic breccia. Exposed after erosion of rocks through which it erupted. |
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