The Photo of the Week #11 is of a superb cave decoration from Kelly Hill caves located on Kangaroo Island, South Australia. I was there in 2009. Most cave decorations are draped against the wall of the cave. More rarely stalactites, stalagmites and other free hanging features form. These are usually perpendicular to the cave floor or ceiling much like icicles. However, even more rarely, odd shapes can grow such as the one pictured below which shows a spiral on the end of a stalactite. The mineral composing the spiral is aragonite, CaCO3, that is precipitating out of the rainwater seeping in through the cave roof.
Another great view of the spiral (Photo: Matt Herod)
Some more great stalactites. (Photo: Matt Herod)
Hope you enjoy the pics.
Cheers,
Matt
