Images

This is a 20 foot section of a drill core collected by the Indiana Geological and Water Survey (IGWS). IGWS geologists dub these cores "golden spikes" when they are drilled deep enough to reach the underlying bedrock.

This map details the subsurface contact between the consolidated Paleozoic bedrock surface and the overlying unconsolidated Quaternary-aged sediments. This image is used with the permission of the Ohio Department of Natural Resources, Division of Geological Survey and the Indiana Geological and Water Survey. 

Justin Hegarty (Reflo Sustainable Water Solutions) and Dr. Tony Parolari (Marquette University) discussing the design of a bioswale at the Green Tech Station on Milwaukee’s north side.

This rat snake is a preserved museum specimen with snake fungal disease that was collected in Tennessee in 1973. The photo was taken at the USGS National Wildlife Health Center in 2017 as part of a study.

View of the Upper Midwest Water Science Center St. Paul office, co-located with the U.S. Forest Service on the University of Minnesota - St. Paul Campus

Entrance to the USDA Forest Products Laboratory building in Madison, Wisconsin, home of the Upper Midwest Water Science Center Wisconsin office and the Mercury Research Laboratory.

A restored section of Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/

USGS scientist holding a milting rainbow trout caught as part of an assessment of fish passage in Underwood Creek at Wauwatosa, Wisconsin, just downstream of I-41/US 45. https://waterdata.usgs.gov/monitoring-location/04087088/

Rainbow trout caught in net in Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/

USGS scientist holding a white sucker fish caught in Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/

USGS scientists electrofishing with a backpack shocker at Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/.

USGS scientist holding a male central stoneroller caught in Underwood Creek at Wauwatosa, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087088/. This fish is native to Wisconsin; the tubercles (bumps) on its head indicate that it is spawning.

Hydrologic technician Garret Welsh conducts an Ice Rod measurement through an augered hole in the frozen St. Croix river near streamgage 05341550 in Stillwater, Minnesota. An Ice Rod is a heavy-duty, 1-inch (2.5 centimeter) diameter, lightweight aluminum rod used for suspending ice meters in fast velocities.

Hydrologic technician Garret Welsh carries a large ice auger while walking across the frozen St. Croix river near streamgage 05341550 in Stillwater, Minnesota.

Scientists at the U.S. Geological Survey Upper Midwest Environmental Sciences Center and the U.S.

The left axis is a visualization of an ensemble of solutions (crosses and dashed lines) iteratively moving down gradient on an objective function surface (color flood) in 2-D parameters space, with the associated prior (gray) and posterior (blue) parameter marginal distributions shown on the two right stacked axes.

Bridge over channel between Fence Lake and Big Crawling Stone Lake in Lac du Flambeau Chain of Lakes, Wisconsin

Researchers instruct volunteers on how to collect dragonfly larvae in Glacier NP as a part of the Dragonfly Mercury Project.

Hydrologic Technician Matt Bach measuring streamflow day after a rain event at USGS streamgage 04085078, DUTCHMAN CREEK AT HANSEN RD AT ASHWAUBENON, WI, using an Acoustic Doppler Current Profiler (ADCP). The ADCP measures water currents by transmitting "pings" of sound at a constant frequency into the water.

A USGS hydrologic technician finishes installation of a rapid-deployment streamgage at Gordonville Road on the Tittabawassee River in Midland, Michigan.

USGS National Wildlife Health Center pathologist examines a cottontail for cause-of-death determination.