USGS research geologists Richard Lease (left) and Jamey Jones (right) take notes and collect samples of fine-grained metamorphic rock hosted as an inclusion in coarser-grained granodiorite.
Images
Browse images from a wide range of science topics covered by USGS. All items in this gallery are considered public domain unless otherwise noted.
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Geologists collect samples and take notes near Lake Clark
USGS research geologists Richard Lease (left) and Jamey Jones (right) take notes and collect samples of fine-grained metamorphic rock hosted as an inclusion in coarser-grained granodiorite.
Geologists make observations above glacial valley
USGS research geologists Jamey Jones (left) and Richard Lease (right) make observations of rock units revealed by the glacier below.
USGS research geologists Jamey Jones (left) and Richard Lease (right) make observations of rock units revealed by the glacier below.
Limnocorral on McKinley Lake
Limnocorral on McKinley Lake, near Cordova, Alaska for Elodea spp. experiment. This experiment is studying the effect of the invasive species Elodea spp. on aquatic ecosystems. Disclaimer statement: Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Limnocorral on McKinley Lake, near Cordova, Alaska for Elodea spp. experiment. This experiment is studying the effect of the invasive species Elodea spp. on aquatic ecosystems. Disclaimer statement: Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Fire ecologists discuss wildfire impacts
Fire ecologists discuss wildfire impacts at a repeat fire site in Wrangells-St. Elias National Park, AK
Fire ecologists discuss wildfire impacts at a repeat fire site in Wrangells-St. Elias National Park, AK
Chinook salmon muscle biopsy
Chinook salmon restrained in a cradle after non-lethal muscle biopsy sample collection for heat stress assessment at a subsistence fish wheel in the Yukon River during July 2017. The muscle biopsy location looks like one of the black spots on the back of the fish.
Chinook salmon restrained in a cradle after non-lethal muscle biopsy sample collection for heat stress assessment at a subsistence fish wheel in the Yukon River during July 2017. The muscle biopsy location looks like one of the black spots on the back of the fish.
Melanistic Common Murre on Gull Island
A melanistic (all dark) Common Murre stands near the base of the Gull Island breeding colony in Kachemak Bay, Alaska, 2017. See related paper published in the Marine Ornithology: Journal of Seabird Research and Conservation at: http://www.marineornithology.org/PDF/50_2/50_2_225-227.pdf.
A melanistic (all dark) Common Murre stands near the base of the Gull Island breeding colony in Kachemak Bay, Alaska, 2017. See related paper published in the Marine Ornithology: Journal of Seabird Research and Conservation at: http://www.marineornithology.org/PDF/50_2/50_2_225-227.pdf.
Male Wilson's Warbler on the Seward Peninsula, Alaska
Male Wilson's Warbler on the Seward Peninsula, Alaska . This photo was taken on the Seward Peninsula as part of the Changing Arctic Ecosystem Boreal-Arctic Transition Zone program.
Male Wilson's Warbler on the Seward Peninsula, Alaska . This photo was taken on the Seward Peninsula as part of the Changing Arctic Ecosystem Boreal-Arctic Transition Zone program.
A Common Murre holding a juvenile Pacific Herring at its colony
A Common Murre holding a juvenile Pacific Herring at its colony on Gull Island, Cook Inlet on July 3, 2017.
A Common Murre holding a juvenile Pacific Herring at its colony on Gull Island, Cook Inlet on July 3, 2017.
Male Wilson's Warbler in a shrub on the Seward Peninsula, Alaska
Male Wilson's Warbler. This photo was taken on the Seward Peninsula as part of the Changing Arctic Ecosystem Boreal-Arctic Transition Zone program.
Male Wilson's Warbler. This photo was taken on the Seward Peninsula as part of the Changing Arctic Ecosystem Boreal-Arctic Transition Zone program.
Seismic survey of the Queen Charlotte Fault
USGS scientists deploy a seismic streamer aboard the R/V David Starr offshore of southeast Alaska to study the Queen Charlotte Fault.
USGS scientists deploy a seismic streamer aboard the R/V David Starr offshore of southeast Alaska to study the Queen Charlotte Fault.
An aerial view of McKinley Lake, outside of Cordova, Alaska
McKinley Lake, outside of Cordova, Alaska. This is the site of deployment of limnocorrals for an Elodea spp. experiment.
McKinley Lake, outside of Cordova, Alaska. This is the site of deployment of limnocorrals for an Elodea spp. experiment.
Reseach vessel Ocean Starr
Research vessel Ocean Starr in Alaska.
Research vessel Ocean Starr in Alaska.
Geologist examines rocks at Darby Pluton, AK
USGS Geologist George Case examines granitic rocks in preparation for collecting samples for geochemistry and geochronology near the Boulder Creek prospect at the north end of the Darby pluton on the eastern Seward Peninsula.
USGS Geologist George Case examines granitic rocks in preparation for collecting samples for geochemistry and geochronology near the Boulder Creek prospect at the north end of the Darby pluton on the eastern Seward Peninsula.
Darby Mountain outcrop of quartz monzonite
Looking east past a typical Darby Mountain outcrop of quartz monzonite towards the contact between the pluton and Paleozoic marbles
Looking east past a typical Darby Mountain outcrop of quartz monzonite towards the contact between the pluton and Paleozoic marbles
Tony Fischbach's staff photo
Tony Fischbach's staff photo
Potassium feldspar phenocrysts in syenite
Stretched phenocrysts of potassium feldspar in syenite of the Kachauik pluton on the Bering Sea coast of the southeastern Seward Peninsula.
Stretched phenocrysts of potassium feldspar in syenite of the Kachauik pluton on the Bering Sea coast of the southeastern Seward Peninsula.
Lone male Yellow Warbler on the Seward Peninsula, Alaska
Lone male Yellow Warbler on the Seward Peninsula, Alaska. This photo was taken on the Seward Peninsula as part of the Changing Arctic Ecosystem Boreal-Arctic Transition Zone program.
Lone male Yellow Warbler on the Seward Peninsula, Alaska. This photo was taken on the Seward Peninsula as part of the Changing Arctic Ecosystem Boreal-Arctic Transition Zone program.
Elim village children explore beach outcrops with USGS geologists
USGS geologists (Andy Allard, Beth Drewes-Todd and Alan Pongratz) investigating the rocks exposed on the beaches near the village of Elim with the trusty local guides and eager budding geologists.
USGS geologists (Andy Allard, Beth Drewes-Todd and Alan Pongratz) investigating the rocks exposed on the beaches near the village of Elim with the trusty local guides and eager budding geologists.
Flooding stream in a permafrost landscape, Kobuk Valley National Park
A flooding stream meanders through a permafrost landscape in Kobuk Valley National Park, Alaska. This work is part of the Hydro-Ecology of Arctic Thawing (HEAT): Hydrology project that takes place in the Arctic Network Parks because they lie in a region
A flooding stream meanders through a permafrost landscape in Kobuk Valley National Park, Alaska. This work is part of the Hydro-Ecology of Arctic Thawing (HEAT): Hydrology project that takes place in the Arctic Network Parks because they lie in a region
Joel Schmutz with an Emperor Goose
Joel Schmutz holding an Emperor Goose
Joel Schmutz holding an Emperor Goose
Glaucous-winged gull in water in Kenai River, Alaska
Glaucous-winged gull in water in Kenai River, Kenai, Alaska
Glaucous-winged gull in water in Kenai River, Kenai, Alaska