SINCLAIR STAMMERS / SCIENCE PHOTO LIBRARY SINCLAIR STAMMERS / SCIENCE PHOTO LIBRARY
Ancient petroglyphs carved by hammering quartz into the sandstone. These rock carvings by the Bushmen or San people, date from 6000 years ago. All the animals of the area were depicted, especially the giraffe as it was sacred to them and represented water since it could reach to the heavens to drink. Zebras, rhinos, lizards, oryx, cheetahs, elephants, sea lions, penguins and flamingos were also carved. The rock is red karroo-aged etjo sandstone. These sediments were deposited 180 million years ago in a desert which covered the interior of the continent of Gondwanaland. Photographed at Twfelfontein, Namibia.
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