Images

Mike Jayred cares the "Priaire Dog" Ice Drill to the coring location.

Mike Jayred and Nathan Chellman work to level the ice drill to begin taking the core.  Craig Lee stabilizes the platform.

Fort Collins Science Center

An ancient ice patch located in the northeastern corner of the Greater Yellowstone Ecosystem.

Craig Lee and Mike Jayred scout a potential drilling location for extracting an ice core.

An ancient ice patch located in the northeastern corner of the Greater Yellowstone Ecosystem

A white-tailed ptarmigan on Mt. Evans, a fourteener in Northern Colorado.

USGS scientists prepare water-quality instruments before going out on the Great Salt Lake. USGS scientists are conducting a study to gain a better understanding of nutrient levels, which could help determine how to best manage algal bloom outbreaks.

USGS scientists conducting a study on the Great Salt Lake to gain a better understanding of nutrient levels, which could help determine how to best manage algal bloom outbreaks.

A white-tailed ptarmigan sits on the side of Mt. Evans in northern Colorado.  

USGS scientists conducting a study on the Great Salt Lake to gain a better understanding of nutrient levels, which could help determine how to best manage algal bloom outbreaks.

USGS scientist Mike Freeman measures nutrient levels in Goggin Drain, Utah. USGS scientists are conducting an experimental study on two Utah water bodies to gain a better understanding of nutrient levels, which could help determine how to best manage algal bloom outbreaks.

USGS scientists Christopher L. Shope, Bryan Downing, Katy O'Donnell and Mike Freeman measure nutrient levels in Goggin Drain, Utah. USGS scientists are conducting an experimental study on two Utah water bodies to gain a better understanding of nutrient levels, which could help determine how to best manage algal bloom outbreaks.

USGS scientists Bryan Downing, Mike Freeman and Katy O'Donnell measure nutrient levels in Goggin Drain, Utah. USGS scientists are conducting an experimental study on two Utah water bodies to gain a better understanding of nutrient levels, which could help determine how to best manage algal bloom outbreaks.

USGS scientists use multiple high-frequency water quality instruments contained in a cage to measure nutrients and algal changes in surface water. Scientists are conducting an experimental study on two Utah water bodies to gain a better understanding of nutrient levels, which could help determine how to best manage algal bloom outbreaks.

USGS scientists Christopher L. Shope, Bryan Downing, Katy O'Donnell and Mike Freeman measure nutrient levels in Goggin Drain, Utah. USGS scientists are conducting an experimental study on two Utah water bodies to gain a better understanding of nutrient levels, which could help determine how to best manage algal bloom outbreaks.

Organics analytical section, USGS National Water Quality Laboratory, Lakewood Colorado, 2016. Photograph by Mark Nilles, U.S. Geological Survey

Erosion along the Rio Puerco during the flood of 2006 following herbicide application to control saltcedar in 2003.

Collecting a sample for detection of N. fowleri in a Teton County hot spring

Sample processing equipment for detection of N. fowleri