Three test tubes with filter paper inside

Three test tubes with filter paper inside

Detailed Description

Photograph of iron(III) oxyhydroxides (yellow-brown color in two left-hand tubes collected on folded filter paper) that was produced in iron(II)-containing groundwater by the addition of nitrate. The tube on the right is a filter collected from the same groundwater before nitrate was added.

Details

Image Dimensions: 2304 x 3072

Date Taken:

Location Taken: US

Credits

U.S. Geological Survey