Skip to main content
ARS Home » Office of Communications » Images » Photos » Jun05 » d115-1

Download a high-resolution (300dpi) digital image here

Image Number D115-1

These rare-earth oxides are used as tracers to determine which parts of a watershed are eroding. Clockwise from top center: praseodymium, cerium, lanthanum, neodymium, samarium, and gadolinium.

Photo by Peggy Greb.

640 pixels wide: (D115-1.jpg)

Please visit our Image Gallery