The Himalayas, it is said, are made of solid granite. Once every thousand years a bird flies over them with a silk scarf in its beak, brushing their peaks with its scarf. When by this process the Himalayas have been worn away, one day of a cosmic cycle will have elapsed.
From The World’s Religions [Kindle] by Huston Smith. An incredible book.
If the title sounds familiar, it’s thanks to Gretchen Rubin.