Close up of chatter marks, Mt. Sirius, Antarctica. Lens cap in the photo is five centimeters across.
—Source: Tom Lowell's Glacier Image Database, University of Cincinnati.

Chatter marks, Quebec, Canada, 1990.
—Source: Natural Resources Canada. Photograph by Isabelle McMartin. Copyright Terrain Sciences Division, Geological Survey of Canada.

Group of chatter marks, Mt. Sirius, Antarctica. Note the pen towards the upper, center of the photo for scale comparision.
—Source: Tom Lowell's Glacier Image Database, University of Cincinnati.

Chatter marks, Mount Desert Island, Maine.
—Source: Tom Lowell's Glacier Image Database, University of Cincinnati.