Images

This is a photo of scientists, Ben Jensen and Shelley Johnson, collecting tissue samples from a rainbow trout on Ross Lake. The USGS Western Fisheries Research Center does work on Ross Lake to understand the food web and ecology for salmon.

This is a photo of a fish in Ross Lake, WA called the Redside Shiner. Ecologists at the Western Fisheries Research Center are studying this fish and the food web in Ross Lake.

This is a photo of Ross Dam as viewed from the boat. This photo was taken by fisheries scientists from the USGS Western Fisheries Research Center.

This is a photo of scientist, Marshal Hoy, holding a bull trout in Ross Lake. The USGS Western Fisheries Research Center does food web studies in Ross Lake to better understand the ecology and habitat for salmon in the area.

These are two USGS Western Fisheries Research Center scientists, Carl Ostberg and Jeff Duda (from left to right), sitting on a fallen tree in Skagit, WA. These scientists study critical fish, like salmon, in the Ross Dam reservoir and tributaries.

Isolated black calcite specimen from the USGS mineral collection. High-definition image showing dark coloration and crystal texture.

Isolated clear calcite specimen from the USGS mineral collection. High-definition image showing transparent crystal structure.

Group of calcite specimens from the USGS mineral collection. High-definition image showing varied textures and crystal forms.

High-definition image of multiple calcite specimens showing diverse crystal structures and color variations

High-definition image of calcite marble specimen with smooth surface and subtle veining.

High-definition image of chalcopyrite specimen showing brassy color and crystal structure.

High-definition image of chalcopyrite, pentlandite,  and pyrrhotite specimen showing metallic luster and granular structure.

Isolated chromite specimen from the USGS mineral collection. High-definition image showing granular texture and dark coloration.

High-definition photography of a chromium-rich chromite specimen from the USGS mineral collection. Image highlights granular texture and dark color.

High-resolution image of a copper ingot from the USGS mineral collection, featuring smooth surfaces, reddish-brown color, and metallic sheen.

Isolated high-definition image of raw copper, highlighting its natural reddish tones, rough texture, and unrefined structure from the USGS collection.

High-definition image of dolomite with sphalerite, showing the white crystalline dolomite matrix interspersed with dark, resinous sphalerite crystals.

Isolated enargite specimen from the USGS mineral collection. High-definition image showing metallic luster and crystal structure.

High-definition image of galena specimen showing crystal faces and silvery-gray color.

USGS mineral specimen featuring galena and chalcopyrite. High-definition image showing metallic textures and color contrast.

Isolated garnierite specimen from the USGS mineral collection. High-definition image showing green coloration and earthy texture.