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Beaver dams on Rabbit Creek, Cape Krusenstern National Monument

Beaver swimming near dam on Rabbit Creek, Cape Krusenstern National Monument

2270-trackline kilometers of geophysical data and 320 km^2 of continuous bathy/backscatter was collected in Leg 1 of the Cape Cod Bay 2019 seafloor mapping cruise.

2270-trackline kilometers of geophysical data and 320 km^2 of continuous bathy/backscatter was collected in Leg 1 of the Cape Cod Bay 2019 seafloor mapping cruise.

2270-trackline kilometers of geophysical data and 320 km^2 of continuous bathy/backscatter was collected in Leg 1 of the Cape Cod Bay 2019 seafloor mapping cruise.

Tree-ring analyses from Lassiter Swamp, located along a tributary of the Chowan River, indicate that cypress trees have occupied the site for at least 500 years. To extend the record even farther back in time, scientists from USGS, Duke University and East Carolina University are working together with students at C.S.

Measuring the amount of water impounded by a beaver dam on Rabbit Creek, Cape Krusenstern National Monument. 

Sunset photo taken during Cape Cod Bay sea-floor mapping cruise.

Arctic cisco (Coregonus autumnalis) captured along the Beaufort Sea coastline in Alaska.

Arctic smelt (Osmerus dentex) captured along the Beaufort Sea coastline in Alaska. This species is a close relative of rainbow smelt (Osmerus mordax).

Arctic smelt (Osmerus dentex) captured along the Beaufort Sea coastline in Alaska. This species is a close relative of rainbow smelt (Osmerus mordax)

Scientists Sarah Laske (USGS ASC), Daniel Fraser (University of Texas and Beaufort Lagoons LTER), and Ashley Stanek (USGS ASC), empty the daily catch of nearshore fishes from a fyke net to a floating net pen in Jago Lagoon in the Arctic National Wildlife Refuge. Note the slumping tundra right along that coastline.

USGS Alaska Science Center scientists Vanessa von Biela (left) and Sarah Laske (right) prepare to empty the daily catch from a fyke net in Kaktovik Lagoon, Arctic National Wildlife Refuge, Alaska, Beaufort Sea.

Dolly Varden (Salvelinus malma) char captured in brackish water along the Beaufort Sea coastline. Dolly Varden are an important subsistence fish across their range.

Members of the science party and the crew of R/V Rachel Carson work to recover an instrumented tripod.

This photo shows an outcrop of pyroclastic flow deposits near Willow Creek on the Pumice Plain at Mount St. Helens. The dramatic lines crossing the outcrop indicate contacts between different layers of pyroclastic flow deposits. Two participants of the 2019 GeoGirls program are shown studying the outcrop, using it to understand the eruptive history of the volcano.

The instrumented tripod is successfully brought onboard for data download.

Scientists from the St.

USGS scientist B.J. Reynolds sets up a solar-powered, satellite-uplinked GPS base station in the Fire Island Wilderness Area to support detailed elevation surveys.