Glossary

Volcano:A mountain or hill, usually conical, having a crater or vent through which lava,rock,hot vapor, and gas are or have been... Flank:The sides of the mound or mountain

Lava tube: Lava tubes are natural conduits through which lava travels beneath the surface of a lava flow.

skylight cave: a skylight cave is formed when PARTS of a lava tube collapse, leaving an opening for light to shine through

lava flow: a stream of lava moving down the sides of a volcano

caldera: a vent or opening at the top of a volcano, which often fills with waters