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. Image Number D1115-1. Photo by Peggy Greb, USDA-ARS.
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rare earth oxides
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. Image Number D1115-1. Photo by Peggy Greb, USDA-ARS.
Copper Mine in the Republic of Georgia
An open-pit mine for volcanic-hosted copper deposits from the Bolnisi District of the Republic of Georgia.
An open-pit mine for volcanic-hosted copper deposits from the Bolnisi District of the Republic of Georgia.
Copper Mine in the Republic of Georgia
An open-pit mine for volcanic-hosted copper deposits from the Bolnisi District of the Republic of Georgia. A controlled blast as part of the mining process can be seen.
An open-pit mine for volcanic-hosted copper deposits from the Bolnisi District of the Republic of Georgia. A controlled blast as part of the mining process can be seen.
Afghanistan's Colorful Mountain Ranges
Colorful mountains of Sar-e-Pul hint of copper (green) and iron (red).
Colorful mountains of Sar-e-Pul hint of copper (green) and iron (red).
Bernard Hubbard Ground-Truthing Remote Sensing
USGS scientist Bernard Hubbard conducting spectral measurements of soils and cover crops to ground truth satellite imagery being used to map soil erosion and runoff potential into the Chesapeake Bay watershed.
USGS scientist Bernard Hubbard conducting spectral measurements of soils and cover crops to ground truth satellite imagery being used to map soil erosion and runoff potential into the Chesapeake Bay watershed.
Hindu Kush Peak in Afghanistan
Hindu Kush peak rises to about 17,000 feet.
Hindu Kush peak rises to about 17,000 feet.
Scenic Panjsher Valley
Scenic Panjsher Valley hosts emerald deposits
Scenic Panjsher Valley hosts emerald deposits
Lapis Lazuli
Rich blue Afghan lapis still intrigues visitors.
Rich blue Afghan lapis still intrigues visitors.
Diatom in Yellowstone Lake Spire
Diatom in spire from floor of Yellowstone Lake, Yellowstone National Park.
Diatom in spire from floor of Yellowstone Lake, Yellowstone National Park.
Yellowstone Lake Spire
Spires from the floor of Yellowstone Lake appear to be composed of diatoms and silicified bacteria.
Spires from the floor of Yellowstone Lake appear to be composed of diatoms and silicified bacteria.
Yellowstone Lake Spire
Spires from the floor of Yellowstone Lake appear to be composed of diatoms and silicified bacteria.
Spires from the floor of Yellowstone Lake appear to be composed of diatoms and silicified bacteria.
Dickite Clay Crystals
Secondary electron image of dickite clay crystals.
Secondary electron image of dickite clay crystals.
Yellowstone Lake Spire
Spires from the floor of Yellowstone Lake appear to be composed of diatoms and silicified bacteria.
Spires from the floor of Yellowstone Lake appear to be composed of diatoms and silicified bacteria.
Firefighters in Smoke
Firefighters surrounded by clouds of smoke and dust of the World Trade Center after the terrorist attacks of September 11, 2001. Photographer's Mate 2nd Class Jim Watson, U.S. Navy.
Firefighters surrounded by clouds of smoke and dust of the World Trade Center after the terrorist attacks of September 11, 2001. Photographer's Mate 2nd Class Jim Watson, U.S. Navy.
Dr. Suzanne Nicholson in Isle Royale, 1996
Dr. Suzanne Nicholson in Isle Royale, 1996
Dr. Suzanne Nicholson in Isle Royale, 1996
Dr. Suzanne Nicholson in Isle Royale, 1996
Quartz mill at Virginia City, Nevada
Quartz mill at Virginia City, Nevada, in the Comstock mining district. Photograph by T.H. O’Sullivan was taken during the U.S. Geographical Exploration of the Fortieth Parallel, which investigated the Virginia City area during the winter of 1867-68. From USGS photographic library collection.
Quartz mill at Virginia City, Nevada, in the Comstock mining district. Photograph by T.H. O’Sullivan was taken during the U.S. Geographical Exploration of the Fortieth Parallel, which investigated the Virginia City area during the winter of 1867-68. From USGS photographic library collection.
EON Geosciences Airplane
EON Geosciences airplane under contract to the USGS for low-level flights in Cedar Rapids/Waterloo, Iowa, area.
EON Geosciences airplane under contract to the USGS for low-level flights in Cedar Rapids/Waterloo, Iowa, area.
Arches National Park
Small Peekhole.
Rare Platinum Nugget
Rare platinum nugget NMNH 73738 from the National Mineral Collection. Photo by Chip Clark, Smithsonian Institution. PGEs are essential for manufacturing computers, TVs, cell phones, and other portable electronic devices. They are found in hard drives, circuitry, and automobiles.
Rare platinum nugget NMNH 73738 from the National Mineral Collection. Photo by Chip Clark, Smithsonian Institution. PGEs are essential for manufacturing computers, TVs, cell phones, and other portable electronic devices. They are found in hard drives, circuitry, and automobiles.
Ahankashan Copper Gold
Series of aerial views from the copper-gold area near Herat. Dark red iron stains hint that other minerals might be found.
Series of aerial views from the copper-gold area near Herat. Dark red iron stains hint that other minerals might be found.