Mammoth Rubbing Rocks
March 15, 2012 Leave a comment
Sonoma Coast State Beach in northern California is famous for its Mammoth Rubbing Rocks. The rocks were polished smooth by the wooly hair of mammoths over 10,000 years ago. Mammoths used the rocks as a scratching post, the same way that elephants rub against tree trunks today. It was incredible to touch the spot that a living mammoth rubbed against so long ago!