Have you ever heard of Tufa stromatolite?
One of the aspects of Geocaching is something called an Earth Cache. An Earth Cache isn 't a physical cache where you have to find a container but rather something that teaches you about the earth and it's geology. Last weekend I did an Earth Cache in Schoenmakerskop set up by Seekoei NMB called PE Tufa stromatolite ecosystems. What is Tufa stromatolite? Please bear with me because this get's very scientific (which means I'm copy and pasting from the listing otherwise…