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In the northwestern part of the Jeffers Petroglyphs site, there is a place where the ground sank down a little next to an outcropping of the Sioux quartzite when the glaciers receded around 10,000 years ago. The bison found it, and every time they walked by this outcropping they would scratch their coats against it. If it was during the springtime, it would be to remove their thick winter coats; anytime else during the year, it would be to remove parasites. Over time, the thick, rough coats of the buffalo wore the surface of the rock down to a glassy finish. When you put your hands on it, you can almost picture the thousands, perhaps millions of buffalo rubbing against the rock over thousands of years to make it this smooth. For more pictures of the buffalo rub, check out TomCat's Travelogue. He has some excellent pictures of the rub and the entire site, and you can see what he thinks of the Jeffers Petroglyphs. |