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CALDERA / CRATER

CALDERA / CRATER. CRATER – FUNNEL SHAPED PIT AT THE TOP OF A VOLCANO. FORMED WHEN MATERIAL IS BLOWN OUT OF THE VOLCANO BY EXPLOSIONS CALDERA – WHEN THE VOLCANO COLLAPSES DUE TO AN EMPTY MAGMA CHAMBER. CRATER. CRATER. CALDERA. CALDERA. Intrusive Volcanic Features.

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CALDERA / CRATER

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  1. CALDERA / CRATER CRATER – FUNNEL SHAPED PIT AT THE TOP OF A VOLCANO. FORMED WHEN MATERIAL IS BLOWN OUT OF THE VOLCANO BY EXPLOSIONS CALDERA – WHEN THE VOLCANO COLLAPSES DUE TO AN EMPTY MAGMA CHAMBER.

  2. CRATER

  3. CRATER

  4. CALDERA

  5. CALDERA

  6. Intrusive Volcanic Features

  7. Sills are thin horizontal sheets of hardened magma between layers. • Laccoliths are blister-like intrusions, usually near the surface, that form when magma pushes overlying layers upward. • Dikes are thin vertical sheets of hardened magma intruded into fractures in the crust. • Batholiths are usually granitic and cover hundreds or thousands of square kilometers.

  8. Which intrusion is the sill and which is the dike?

  9. Sill

  10. The neck of a volcano is the solidified material that fills the vent or pipe of a dead volcano.

  11. Devils Tower is a volcanic neck that is 865' tall. It is located in northeastern Wyoming. It was the first National Monument proclaimed in the United States.

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