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USGS scientist Pete Boma and Jennifer Cavanaugh retrieve ice core to obtain sediment samples for the nitrogen project.: Full resolution

USGS scientist Pete Boma and Jennifer Cavanaugh retrieve ice core to obtain sediment samples for the nitrogen project.

Photo by Bill Richardson, USGS, UMESC, 2002

Usage: This image is public domain/of free use. Please refer to the USGS Copyright section for more details.

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