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Photographic gallery.  Thousands of particles under the microscope.
Columbia River Sand

Columbia River Sand at N 49-01.667' and W 117-36.211'

Macro Photograph (Click here for images at higher magnification and polarized light.)


This deposit sample was part of a study for the distribution of slag particles introduce into the Columbia River from a smelter upstream.

Significance in the Environment:

Characteristic Features:

Associated Particles: