Hendrik van den Berg: This is an excellent photo. I recently visited Kruger NP. Our tour guide commented on these rock formation (you call them Granite Koppies). I think our guide claims these are some of the oldest rock formations on earth, dating back some 3.5 billion years to the break up of the super continent Pangea. Can you tell me more about the geology or direct me to a website that gives more details? I would be grateful for direction to additional information on this?