1. Igneous Rock Features

2. Batholith Hardened magma chamber
Can be 100’s of kilometers wide, long and thick

5. Laccolith
Magma that came up through the crust and hardened, but never broke through and never became a volcano.
Pushes up layers of rock
Smaller than a batholith

7. Dike
Magma squeezes into vertical cracks that cut across rock layers

9. Sill
Magma squeezes into horizontal cracks between rock layers

11. Volcanic neck
A volcano stops erupting and the magma hardens inside the vent.
Erosion wears away the sides of the volcano and leaves the solid center

14. Caldera
Large opening formed when the top of a volcano collapses down into the partially emptied magma chamber

16. Volcanic Bombs, Easter Island
Devil’s Postpile, CA

17. Giant’s Causeway, Ireland