JBTC3.3

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Notes 3.3

 * shield volcano** - the hardened layers of lava that build up
 * cinder cone** - a cone shaped hill or mountain
 * composite volcano** - tall cone shaped mountain fo layers of lava alternate with ash, cinders, and bombs
 * caldera** - the hole left by the eruption collapses into the volcano
 * volcano neck** - looks like a giant tooth that is stuck into the ground
 * dike** - the magma that forces itself through rock layers that harden
 * sill** - the magma that squeezes between the layers of rocks