Next pictures to blog...a Tufa waterfall...the third longest in the world, called the Crying Tufa...in the Blyde River Canyon and I've got some very good pictures on it! A tufa waterfall is formed when water running over dolomite rock absorbs calcium. Mosses which grow on the rocks in the stream extract carbon dioxide during photosynthesis which precipitates the calcium from the water to deposit it as layers of tufa on the surface of the waterfall - a process that takes millions of years. The waterfall continue to flow underneath this rock-hard outer shell. There are only a few active tufa waterfalls in the world - one of which is at the Blyderivierspoort Dam.
Here is a fantastic link to keep your mind busy while I'm sorting my pictures...
Here are two links to spider websites, South African spiders and I've sent an email to Norman on the one site to identify the spider on this pic for me!
This one is Science magabout spiders
Bio Museums about spiders with Norman.










