Cave

A cave is an air- or water- filled void beneath the ground, where there is insufficient rock to prevent human access.

They can be formed by

• acidic rainwater, eroding away large of rocks such as limestone.
• lava cooling and solidifying - either in bubbles, or when the crust of a lava flow solidifies, while the still-liquid lava underneath moves on.
• waves - on coasts, waves can pound out caves in cliffs.
• erosion from wind or water

External links[edit]

• Limestone caves: A Result of Noah’s Flood?

• Glossary