Images

McKinley Lake, outside of Cordova, Alaska. This is the site of deployment of limnocorrals for an Elodea spp. experiment. 

Research vessel Ocean Starr in Alaska.

USGS biological science technician Shannon Waters releases a Chinook Salmon into an Alaskan river.

USGS scientists deploy a seismic streamer aboard the R/V David Starr offshore of southeast Alaska to study the Queen Charlotte Fault.

The Landsat archive, the world's longest continuously acquired collection of space-based, moderate-resolution land remote sensing data, has now surpassed 7 million scenes since Landsat 1 first began collecting data in July 1972.

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.

Looking east past a typical Darby Mountain outcrop of quartz monzonite towards the contact between the pluton and Paleozoic marbles

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. This photo was taken on the Seward Peninsula as part of the Changing Arctic Ecosystem Boreal-Arctic Transition Zone program.

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. 

Joel Schmutz holding an Emperor Goose

USGS scientists Kate Scharer, Richard Lease, and Adrian Bender excavate a marine terrace elevated tens of meters above sea level on the west side of the Fairweather Fault. Location: Icy Point, Glacier Bay National Park, Alaska.

USGS scientists Richard Lease and Adrian Bender examine river terraces elevated tens of meters above the modern channel level on the west side of the Fairweather Fault. Location: Kaknau Creek, Icy Point, Glacier Bay National Park, Alaska.

Kasilof River bridge

A Black-capped Chickadee with a beak that has grown long and crossed

Research Hydrologist Neil Terry (USGS) collects ground-penetrating radar (GPR) data. Using hydrogeophysical tools such as GPR enables scientists to collect images of the structure and conditions of the ice below them. (April 2017)

Research Hydrologist Neil Terry (USGS) collects ground-penetrating radar (GPR) data along an oil pipeline in Alaska. (April 2017)

Research Hydrologist Martin Briggs (USGS) tows ground-penetrating radar (GPR) during field work in Alaska. (April 2017)

Helicopters are often used to carry scientists and equipment to remote study areas in Alaska. In this photo, a ground-penetrating radar (GPR) unit is securely strapped to the side of the helicopter. (April 2017)

Research Hydrologist Martin Briggs (USGS) collects ground-penetrating radar (GPR) data. He is wearing special ice cleats on his shoes to have better traction walking on the ice. (April 2017)

USGS Research Geophysicist Andy Kass (left, in orange) adjusts surface nuclear magnetic resonance equipment (NMR) with input from collaborators Eliot Grunewald (Vista Clara), Alex Huryn (University of Alabama), and Patrick Hendrickson (University of Colorado). NMR is being used to measure the distribution of liquid water in the subsurface. (April 2017)