Gallery - Category: Wolkberg - Image: Tufa Waterfall at Klipkraal

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Image 151 of 164

Image 153 of 164

Description: 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.
Date: Tuesday, 10 February 2015
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Author: Heinrich Human
File size of the original image: 954.94 KB (3872 x 2592 px)

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