Close-up of water dripping down a stalactite in a cave. Stalactites are protrusions of rock from the ceiling of a cave. They form as mineral-rich water drips down through the porous rock, each drop leaving behind a tiny bit of its dissolved minerals. Over many years the minerals form long icicle-like formations. Below the stalactites, the dripping water can form similar structures rising from the ground, known as stalagmites. In some cases the two may meet to form a column. These features are common in karst regions, with an underlying bedrock of limestone. Limestone is soluble in slightly acidic water, leading to the formation of extensive cave systems | |
Licence : | Droits gérés |
Crédit : | Science Photo Library / Chee, Francis |
Model Release : | Non requis |
Property release : | Non requis |
Durée : | 11 Secondes |
Aspect ratio : | 16/9 |
Restrictions : | - |