cave

Natural underground cavity that results from the slow dissolution and erosion of rock by water.

resurgence

Where an underground watercourse reappears at the surface after disappearing further upstream.

dry gallery

Underground corridor that forms when the water table drops.

stalagmite

Crystalline rock formation caused by the evaporation of water droplets that fall on the floor of the cave.

subterranean stream

Watercourse that flows through underground cavities.

column

Crystalline rock formation that results when a stalactite meets a stalagmite.

gour

Small basins hollowed out by water.

swallow hole

Deep hole connecting the ground surface to an underground gallery; it is caused by the collapse of the cave’s vault.

pothole

Natural well connecting a sinkhole to an underground swallow hole.

lapiaz

Calcareous rock surface with crests separated by grooves that are often deep; it is shaped by the water.

stalactite

Crystalline rock formation caused by the partial evaporation of water droplets from the vault of the cave.

sinkhole

Basin formed by continuous water infiltration into calcareous rock, causing the dissolution of the rock.

waterfall

Almost vertical flow of a watercourse, caused by a sudden change in the level of its bed.

gorge

Deep narrow ravine along which a permanent or intermittent river flows.

water table

Vast expanse of underground water fed by rainwater filtering through the earth; it supplies springs and can be collected in wells.