Rhodes Summer 2007: Etona - Archangelos

Caves are formed by geologic processes. These may involve a combination of chemical processes, erosion from water, tectonic forces, microorganisms, pressure and atmospheric influences. Most caves are formed in limestone by solution. The largest and most abundant solutional caves are located in limestone. Limestone dissolves under the action of rainwater and groundwater charged with H2CO3 (carbonic acid) and naturally occurring organic acids. The dissolution process produces a distinctive landform known as karst, characterized by sinkholes, sinking streams, and underground drainage. Limestone caves are often adorned with calcium carbonate formations produced through slow precipitation, including the most common and well-known stalactites and stalagmites. These secondary mineral deposits in caves are called speleothems.

Canon Eos 350D 18-55mm

Photo 1-5: F4.5-F7.1 1/60sec ISO 100