A stalagmite is a tapering columnar structure which rises from the floor of a cave. It is formed from mineral deposits usually mixed with water which drips from the ceiling. In the case of Aranui Cave at the famous Waitomo Caves in the Waikato region of New Zealand, the deposits are made up of limestone.
Stalactites on the other hand are tapering structures which hang from the ceiling of the cave like icicles. A stalactite is also formed from mineral deposits.
Over many years of dripping and mineral build up, stalagmites and stalactites will sometimes connect - this formation is known as a column.
Waitomo Caves, a network of caves in the Waikato Region is a major tourist attraction on the North Island of New Zealand. ... continue below the picture...
... Aranui Cave is among the main set of caves which tourists visits, other caves include Waitomo Cave, Ruakuri Cave, Gardner's Gut. Each of these caves are noted for their impressive stalagmite and stalactite formations as well as the presence of glowworms.
Aranui Limestone Cave at Waitomo Caves, Waikato, North Island, New Zealand.
Technical Information:
I photographed this photo with the digital SLR camera model Canon EOS-1Ds Mark II, aperture of f/10.0, exposure time of 4/1 sec. on ISO 100, as always I used a original Canon Lens, the focus lenght for this picture was 70mm.