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Images
USGS scientist Art Bookstrom photographs copper-stained banded siltite, exposed in the Blacktail pit of the Blackbird cobalt-copper mine, Salmon River Mountains, east-central Idaho.
USGS scientist Art Bookstrom photographs copper-stained banded siltite, exposed in the Blacktail pit of the Blackbird cobalt-copper mine, Salmon River Mountains, east-central Idaho.
USGS scientist John Slack holds his hammer to a biotitic mafic dike, intruded into twice-folded banded siltite, exposed in the Hawkeye adit of the Blackbird cobalt-copper mine, in the Salmon River Mountains of east-central Idaho. Biotite is a type of mica, and mafic refers to a high magnesium and iron content.
USGS scientist John Slack holds his hammer to a biotitic mafic dike, intruded into twice-folded banded siltite, exposed in the Hawkeye adit of the Blackbird cobalt-copper mine, in the Salmon River Mountains of east-central Idaho. Biotite is a type of mica, and mafic refers to a high magnesium and iron content.
The river outlet tubes at Glen Canyon Dam on the Colorado River in Arizona. At noon Monday, Nov. 19, U.S.
The river outlet tubes at Glen Canyon Dam on the Colorado River in Arizona. At noon Monday, Nov. 19, U.S.
The ice froze around the fence post, the stage in the river went up, then the river froze again, creating a large gage height correction - Heart River near Richardton, North Dakota.
The ice froze around the fence post, the stage in the river went up, then the river froze again, creating a large gage height correction - Heart River near Richardton, North Dakota.
Fine-grained silica sand is mixed with chemicals and water before being pumped into rock formations to prevent the newly created artificial fractures from closing after hydraulic fracturing is completed.
Fine-grained silica sand is mixed with chemicals and water before being pumped into rock formations to prevent the newly created artificial fractures from closing after hydraulic fracturing is completed.
Well heads hooked up in preparation for a hydraulic fracturing operation at a drill pad in the Fayetteville Shale gas play of Arkansas.
Well heads hooked up in preparation for a hydraulic fracturing operation at a drill pad in the Fayetteville Shale gas play of Arkansas.
A water impoundment at a drill pad in the Fayetteville Shale gas play of Arkansas.
A water impoundment at a drill pad in the Fayetteville Shale gas play of Arkansas.
A water impoundment at a natural gas drilling site in the Marcellus Shale gas play of southwestern Pennsylvania.
A water impoundment at a natural gas drilling site in the Marcellus Shale gas play of southwestern Pennsylvania.
A drill rig at a well site in the Marcellus Shale gas play of southwestern Pennsylvania.
A drill rig at a well site in the Marcellus Shale gas play of southwestern Pennsylvania.
Team of scientists working together to insert a tracking device in a 14 foot Burmese python.
Team of scientists working together to insert a tracking device in a 14 foot Burmese python.
A view of the badlands terrain with Bakken oil and gas production "pads" in the distance, Billings County, North Dakota.
A view of the badlands terrain with Bakken oil and gas production "pads" in the distance, Billings County, North Dakota.
A view of the badlands terrain with Bakken oil and gas production "pads" in the distance, Billings County, North Dakota.
A view of the badlands terrain with Bakken oil and gas production "pads" in the distance, Billings County, North Dakota.
Herring larvae 15 days post-hatch. Food in the gut appears orange.
Herring larvae 15 days post-hatch. Food in the gut appears orange.
Currently four age classes (0, 1, 2, and 4 year olds) of SPF herring are maintained at the Marrowstone Marine Field Station.
Currently four age classes (0, 1, 2, and 4 year olds) of SPF herring are maintained at the Marrowstone Marine Field Station.
Once a bear is radio collared, researchers can track its movements with telemetry.
Once a bear is radio collared, researchers can track its movements with telemetry.
When looking for a place to set up a trapping location, scientists look for existing bear sign such as scratches on trees and bear scat. Sometimes traps are set in areas that have no obvious bear sign to determine if indeed bears are present.
When looking for a place to set up a trapping location, scientists look for existing bear sign such as scratches on trees and bear scat. Sometimes traps are set in areas that have no obvious bear sign to determine if indeed bears are present.
Researchers with IGBST measure the bear's girth as part of body fitness data collection.
Researchers with IGBST measure the bear's girth as part of body fitness data collection.
A flock of wintering northern pintail ducks takes flight in Northern Honshu, Japan.
A flock of wintering northern pintail ducks takes flight in Northern Honshu, Japan.
Drought and climate change are causing extensive forest dieback in the U.S. West as well as worldwide. These photos show dead ponderosa pines in the Jemez Mountains of New Mexico killed by a combination of drought stress and attacks by bark beetles on weakened trees.
Drought and climate change are causing extensive forest dieback in the U.S. West as well as worldwide. These photos show dead ponderosa pines in the Jemez Mountains of New Mexico killed by a combination of drought stress and attacks by bark beetles on weakened trees.
Whitish areas on this diseased sunflower sea star (Pycnopodia helianthoides) are lesions that result in detachment of arms from the central disc.
Whitish areas on this diseased sunflower sea star (Pycnopodia helianthoides) are lesions that result in detachment of arms from the central disc.
Residents and visitors should not be alarmed to witness a low-flying helicopter over southeastern Missouri starting in mid to late February, 2014.
Residents and visitors should not be alarmed to witness a low-flying helicopter over southeastern Missouri starting in mid to late February, 2014.