USGS - Science for a changing world

Caves, Sinkholes and Springs

This Science Feature can be found at:

Collage of soluble rock layers of Karst.

Soluble rock layers called “Karst” exist throughout the nation. While Karst aquifers produce half the nation’s drinking water, rock layers underneath karst dissolve easily sometimes creating sinkholes that threaten life and property. Join us May 4th to learn more about this unseen world beneath our feet.

Learn more: