Images

A sample of finchite, a newly discovered uranium mineral. Finchite is the yellow material on the surface of the rock. Finchite is found in the late Pleistocene sediments deposited during the Illinoian glacial stage.

The Southern High Plains of New Mexico, Oklahoma, and Texas. USGS conducted a uranium assessment in this region in 2015.

The Southern High Plains of New Mexico, Oklahoma, and Texas. USGS conducted a uranium assessment in this region in 2015.

Cinnabar mine site in Idaho.

Figure 2. Bluish-gray elongate amphibole bundles found in samples of commercial expanded vermiculite ore from Libby.

The Concord heavy-mineral-sands mine of Iluka Resources in south-central Virginia.

Figure 3. Secondary electron images of elongate amphibole bundles from the sink fractions of commercial expanded vermiculite ore.

Photo showing intense acid-sulfate hydrothermal alteration on Red Mountain No. 2, Silverton CO. View is looking to the west across Corkscrew Gulch. 

Supergene Leached zone at Silver Bell Mine, AZ.

USGS photo of Ray Copper Mine in Pinal County, Arizona. Taken by Mark Coker on September 1, 2007. Revised for brightness and contrast for use as a webpage Carousel image.

Union for International Cancer Control (UICC) asbestos amosite standard.

Winchite-richterite asbestos, Colorado.

Spires from the floor of Yellowstone Lake appear to be composed of diatoms and silicified bacteria.

Aluminum x-ray intensity map of a high temperature inclusion from the Allende meteorite.

Spires from the floor of Yellowstone Lake appear to be composed of diatoms and silicified bacteria.

Photograph of ant taken with electron microscope.

Secondary electron image of dickite clay crystals.

Spires from the floor of Yellowstone Lake appear to be composed of diatoms and silicified bacteria.

Diatom in spire from floor of Yellowstone Lake, Yellowstone National Park.