Gurley Dip Needle Lake Superior Model with Case
Also known as a Forrester's Compass or Miner's Compass, a dip (or dipping) needle is an instrument for measuring the intensity of the earth's magnetic field. It is used to locate buried or hidden metal. Manufactured by W. & L.E. Gurley, Troy, New York. Object ID: USGS-000345...
Location: USA

Grover
Grover was built in just four months in 1971 by the USGS Astrogeology Research Program (called the Branch of Astrogeology at the time) and used to training Apollo 15-17 astronauts at the Cinder Lakes training ground near Flagstaff, in California’s Mojave Desert, and in the Rio Grande gorge near Tao...
Location: USA

Horseshoe Lake
View of tree kill area at Horseshoe Lake in the Long Valley Caldera along the east side of the Sierra Nevada in east-central California....
Location: CA, USA

Hot Creek Bridge
Hot Creek with bridge. Date unknown but the bridge has not been in existence for several years....
Location: CA, USA

Horseshoe Lake Bathroom
Sign above bathroom at Horseshoe Lake announcing CO2 hazard. Notice the ventilation in the bathroom....
Location: CA, USA

CO2 Hazard Area sign
CO2 Hazard sign at Horseshoe Lake....
Location: CA, USA

Horseshoe Lake
Tree kills at Horseshoe Lake....
Location: CA, USA

View from Mammoth Mountain Gondola
Viewing domes and craters from the Mammoth Mountain gondola....
Location: CA, USA

Horseshoe Lake from Top of Mammoth Mountain
The tree kill area at Horseshoe Lake is visible from the top of Mammoth Mountain....
Location: CA, USA

Deploying Fishing Nets
USGS scientists on USGS Research Vessel Musky II, deploying nets for fishing on Lake Erie....
Location: USA

Solar-Powered Streamgage
Solar-powered streamage on Lackawaxen River, PA supports Lake Wallenpaupack hydropower facility....
Location: PA, USA

Solar-Powered Streamgage
Solar-powered streamgage in Swiftcurrent Creek at Many Glacier, Montana....
Location: MT, USA

Canal and Water Control Structure
Canal 59 in the foreground and Control Structure S-191, which controls water flow into Lake Okeechobee....
Location: FL, USA

Buoys and Birds
On the Lake Okeechobee side of Control Structure S-191, double-crested cormorants rest atop the buoys and wooden posts. Lake Okeechobee is seen to the right....
Location: FL, USA

Boat Exiting Navigational Lock
With canal-side gates closed behind them and the Lake Okeechobee lakeside gates open before them, a boater slowly exits from the Port Mayaca Navigational Lock....
Location: FL, USA