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Two scientists collect a sediment core from the Root River at Grange Avenue in Greenfield, Wisconsin

Detailed Description

Biologist Pat Perner (USGS Upper Midwest Environmental Science Center, left) and Field Assistant Justin Peschman (UMid WSC, right) collect a sediment core from the Root River at Grange Avenue in Greenfield, Wisconsin. https://waterdata.usgs.gov/monitoring-location/04087214/

Sources/Usage

Public Domain.

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