Images

Meadows spring weather station site, Shenandoah National Park.

Exposures of sedimentary rocks in the western Brooks Range, Alaska were evaluated for their contents of metals and phosphate and for their petroleum maturation histories to determine the potential for undiscovered resources in the southern National Petroleum Reserve Alaska.

Honeycomb weathering of sandstone located on the shores of Puget Sound occurs when expanding salt crystals break fragments of rock, creating a small hole that becomes larger as the process repeats itself over time.

The ochre sea star is a common starfish found along the shores of Puget Sound.  This intertidal dweller feeds primarily on mussels and snails, and may live as long as twenty years.

Setting block net across an intertidal rivulet draining a hurricane-derived mudflat.  Net is retrieved at low tide to obtain an estimate of fish catch.  Fish density was found to be greater in waters draining natural tidal forests than in waters from mudflats formed as a result of landfall of a Category 5 hurricane on Cape Sable, Everglades National Park i

Madison river  weather station site, Shenandoah National Park.

Rim of Kilauea Volcano.

Eagle was our put-in point for our first synoptic cruise down the Yukon River.

Sunrise on an evapotranspiration-monitoring site in a riparian grassland along the Platte River, Nebraska on September 25, 2007.

Taryn Lopez measuring the temperature of gas emissions near summit of Augustine Volcano.

I took this picture while setting up a study of this invasive spp.  Of snail. 

Backscattered electron image of radiating fibers of kaolinite growing in volcanic rock altered by fluids connected to hot springs near Lassen Volcanic National Park. Associated with the kaolinite are rounded masses of silica and iron oxides (bright areas) that formed from pyrite. The composition and textures help us evaluate the origin of ore deposits and

Pu'u 'O'o was not as fumy today as usual, allowing decent views of the crater floor. The Pu'u 'O'o webcam, GPS station, and other equipment are the white dots on the crater rim.

One of the many successive littoral explosions that occurred at the Puhi-o-Kalaikini ocean entry, where lava exiting the tube enters the water. The explosions were throwing ejecta up to about 20 meters.

The Puhi-o-Kalaikini ocean entry and delta. The light colored lava on the delta behind the plume is from recent surface flows.

Rivers in middle Tennessee crested May 2-3,2010, breaking records at many USGS-operated streamgages. The flood peak on the Cumberland River in downtown Nashville ranks as the highest observed during the past 73 years.

This image is of solar panels in Colorado.

USGS Hydrologists using the USGS Well Flowmeter and Downhole Sampler on a well in Moore, Oklahoma. More info can be found in Fact Sheet 2005-3111 (PDF).

Photo of observation well, pressure transducer, and electric water-level tape in Norman, Oklahoma.

Hooks baited with worms are clipped to trotlines in an effort to catch pallid sturgeon in the Lower Missouri River.

"As our future scientists, it is important that these students understand the Department's role in space-based science and how they can make a positive impact on the Colorado economy by pursuing high tech jobs," said Secretary Salazar. "I applaud schools like Skyline for providing the resources and training needed to create an innovative workforce."