Scratch Circles

David Marvin's Scratch Circle

This is a photo of a scratch circle taken by David Marvin

However, the lack of snow and ice on the beaches has allowed unique features called scratch circles, or Scharrkreise, to form on the sand. Etched by windblown, dried dune grasses, the circles take shape when the wind causes a bent stalk of grass to pivot around on its axis, scratching out an arc or full circle in the sand.

Source: Scratch circle and Earth Science Picture of the Day

Further Reading

This makes me think of Andy Goldsworthy and some of his work.