Glens Falls and the surrounding autumn foliage of the mountain forests.
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Glens Falls and the surrounding autumn foliage of the mountain forests.
A grassy marsh in Chaleston, South Carolina.
A grassy marsh in Chaleston, South Carolina.
View of water cascading over Hickory Nut Falls.
View of water cascading over Hickory Nut Falls.
View of Hickory Nut Falls with cascading water. Branches from trees in foreground.
View of Hickory Nut Falls with cascading water. Branches from trees in foreground.
Photo of horses at a USGS groundwater sampling well from USGS circular 1359 " Groundwater Quality in the Columbia Plateau and Snake River Plain Basin-Fill and Basaltic-Rock Aquifers and the Hawaiian Volcanic-Rock Aquifers, Washington, Idaho, and Hawaii, 1993 - 2005." As part of the NAWQA Program, wa
Photo of horses at a USGS groundwater sampling well from USGS circular 1359 " Groundwater Quality in the Columbia Plateau and Snake River Plain Basin-Fill and Basaltic-Rock Aquifers and the Hawaiian Volcanic-Rock Aquifers, Washington, Idaho, and Hawaii, 1993 - 2005." As part of the NAWQA Program, wa
![Hydrologist sampling for sediment and turbidity, Little Colorado River, Grand Canyon](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/wss-sediment-sampling-grand-canyon.jpg?itok=3L2IYX9T)
Here, a U.S. Geological Survey (USGS) hydrographer is collecting a suspended-sediment water sample from the Little Colorado River, a kilometer upstream from the Little Colorado River, Grand Canyon, Arizona, USA.
Here, a U.S. Geological Survey (USGS) hydrographer is collecting a suspended-sediment water sample from the Little Colorado River, a kilometer upstream from the Little Colorado River, Grand Canyon, Arizona, USA.
![Atlanta, Georgia: Impervious areas affect rainfall runoff, flooding, and water quality](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/wss-wq-impervious-areas-aerial.jpg?itok=Vss5r29p)
Impervious areas can affect precipitation runoff and flooding, and water quality
Impervious areas can affect precipitation runoff and flooding, and water quality
![Installation of shallow water-table monitoring well](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/cir1357_ch2_photo02.sampling.cropped_20130408_DENV.jpg?itok=6VQW2SWi)
Installation of shallow water-table monitoring well from the USGS Circular 1357 "Water Quality in the Denver Basin Aquifer System, Colorado 2003-2005."
Installation of shallow water-table monitoring well from the USGS Circular 1357 "Water Quality in the Denver Basin Aquifer System, Colorado 2003-2005."
![USGS geologist taking notes sitting in a field.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/Julie.jpg?itok=FuA_gmQo)
Julie Donnelly-Nolan taking notes while working in the field at Newberry Volcano.
Julie Donnelly-Nolan taking notes while working in the field at Newberry Volcano.
Aerial view of Lake Lure with mountain range in the background.
Aerial view of Lake Lure with mountain range in the background.
Aerial view of Lake Lure with mountain range in the background.
Aerial view of Lake Lure with mountain range in the background.
![Large Public Supply Well in the Snake River Plain, USA](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/cir1359_ch5_photo_PubSupply_wevo.jpg?itok=KKXfccIE)
Large Public Supply Well in the Snake River Plain, USA. Photo from USGS circular 1359 " Groundwater Quality in the Columbia Plateau and Snake River Plain Basin-Fill and Basaltic-Rock Aquifers and the Hawaiian Volcanic-Rock Aquifers, Washington, Idaho, and Hawaii, 1993 - 2005"
Large Public Supply Well in the Snake River Plain, USA. Photo from USGS circular 1359 " Groundwater Quality in the Columbia Plateau and Snake River Plain Basin-Fill and Basaltic-Rock Aquifers and the Hawaiian Volcanic-Rock Aquifers, Washington, Idaho, and Hawaii, 1993 - 2005"
Small waterfall cascading over rocks near trees. Snowy bank in foreground.
Small waterfall cascading over rocks near trees. Snowy bank in foreground.
Small waterfall cascading over rocks surrounded by trees.
Small waterfall cascading over rocks surrounded by trees.
Little Stoney Creek within snow-covered forestland.
Little Stoney Creek within snow-covered forestland.
![Map of the known ash-fall boundaries for several U.S. eruptions](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/vhp_img316.png?itok=nXbi6Yro)
Eruptions of the Yellowstone volcanic system have included the two largest volcanic eruptions in North America in the past few million years; the third largest was at Long Valley in California and produced the Bishop ash bed. The biggest of the Yellowstone eruptions occurred 2.1 million years ago, depositing the Huckleberry Ridge ash bed.
Eruptions of the Yellowstone volcanic system have included the two largest volcanic eruptions in North America in the past few million years; the third largest was at Long Valley in California and produced the Bishop ash bed. The biggest of the Yellowstone eruptions occurred 2.1 million years ago, depositing the Huckleberry Ridge ash bed.
A mountain road surrounded by colorful, deciduous autumn foliage in the Appalachian Mountains.
A mountain road surrounded by colorful, deciduous autumn foliage in the Appalachian Mountains.
A mountain road and surrounding early autumn foliage photographed from a higher elevation in the Appalachian Mountains. The especially prominent orange leaves of a maple tree are in the foreground.
A mountain road and surrounding early autumn foliage photographed from a higher elevation in the Appalachian Mountains. The especially prominent orange leaves of a maple tree are in the foreground.
Large-scale poster describing USGS work.
Large-scale poster describing USGS work.
Waves crashing against rocks off the Pacific coast of California.
Waves crashing against rocks off the Pacific coast of California.
Waves crashing against rocks off the Pacific coast of California.
Waves crashing against rocks off the Pacific coast of California.