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Lower Falls and Grand Canyon of the Yellowstone River. The river here is eroding young, post-caldera rhyolite that was softened by hydrothermal alteration. The V shape of the canyon indicates that the river is actively eroding in response to regional uplift. Photo by Richard Tollo, George Washington University, August 12, 2008.
Lower Falls and Grand Canyon of the Yellowstone River. The river here is eroding young, post-caldera rhyolite that was softened by hydrothermal alteration. The V shape of the canyon indicates that the river is actively eroding in response to regional uplift. Photo by Richard Tollo, George Washington University, August 12, 2008.
Narrow Gauge spring, Mammoth Hot Springs, Yellowstone National Park. Vent area is between the two trees on top of the travertine deposits. Terraced pools form due to deposition of travertine from the fluids as they cool and degas carbon dioxide.
Narrow Gauge spring, Mammoth Hot Springs, Yellowstone National Park. Vent area is between the two trees on top of the travertine deposits. Terraced pools form due to deposition of travertine from the fluids as they cool and degas carbon dioxide.
GPS station P714, located in Panther Meadow south of Mammoth Hot Springs in Yellowstone National Park. Photo by EarthScope Consortium, June 2008.
GPS station P714, located in Panther Meadow south of Mammoth Hot Springs in Yellowstone National Park. Photo by EarthScope Consortium, June 2008.
Supplemental feeding of bison on the National Elk Refuge, Wyoming in February 2008.
Supplemental feeding of bison on the National Elk Refuge, Wyoming in February 2008.
Supplemental feeding of bison on the National Elk Refuge, Wyoming in February 2008.
Supplemental feeding of bison on the National Elk Refuge, Wyoming in February 2008.
Elk and bison being fed on the National Elk Refuge, Wyoming. Grand Teton and Grand Teton National Park are in the background.
Elk and bison being fed on the National Elk Refuge, Wyoming. Grand Teton and Grand Teton National Park are in the background.
Fish Creek, Wyoming
Aerial view of the National Elk Refuge (left) and the town of Jackson, Wyoming (right) in 2007.
Aerial view of the National Elk Refuge (left) and the town of Jackson, Wyoming (right) in 2007.
An eruption of Daisy Geyser in the Upper Geyser Basin of Yellowstone National Park. The geyser erupts boiling water at about 93 °C (200 °F). Photo by Shaul Hurwitz on April 12, 2007.
An eruption of Daisy Geyser in the Upper Geyser Basin of Yellowstone National Park. The geyser erupts boiling water at about 93 °C (200 °F). Photo by Shaul Hurwitz on April 12, 2007.
National Agriculture Imagery Program natural-color image from September 9, 2006, showing newly mapped thermal areas (outlined in yellow) on the north side of the Mallard Lake resurgent dome.
National Agriculture Imagery Program natural-color image from September 9, 2006, showing newly mapped thermal areas (outlined in yellow) on the north side of the Mallard Lake resurgent dome.
Upper Lebo Member of the Fort Union Formation. Photo taken fro the top of Cow Creek Buttes in the Burnt Hollow BLM recreation area about 20 miles northeast of Gillette, Wyoming.
Upper Lebo Member of the Fort Union Formation. Photo taken fro the top of Cow Creek Buttes in the Burnt Hollow BLM recreation area about 20 miles northeast of Gillette, Wyoming.
Single species stand of nonnative tamarisk on the Lower Colorado River at Cibola National Wildlife Refuge, California
Single species stand of nonnative tamarisk on the Lower Colorado River at Cibola National Wildlife Refuge, California
Old Faithful Geyser in eruption. Under Yellowstone Research Permit YELL-SCI-8030, 13 mineralized wood specimens were collected from the geyser mound. The dates of the mineralized wood samples imply that such eruptions did not take place for over a century between the mid-13th to mid-14th centuries.
Old Faithful Geyser in eruption. Under Yellowstone Research Permit YELL-SCI-8030, 13 mineralized wood specimens were collected from the geyser mound. The dates of the mineralized wood samples imply that such eruptions did not take place for over a century between the mid-13th to mid-14th centuries.
Aerial (balloon) view of Norris Geyser Basin, Yellowstone National Park, looking northwest from the south. USGS Photo by Brita Graham Wall, 2005.
Aerial (balloon) view of Norris Geyser Basin, Yellowstone National Park, looking northwest from the south. USGS Photo by Brita Graham Wall, 2005.
Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park. Grand Prismatic is the largest hot spring in Yellowstone and the third largest in the world. Photograph by Robert Fournier.
Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park. Grand Prismatic is the largest hot spring in Yellowstone and the third largest in the world. Photograph by Robert Fournier.
A comparison of black cinders from Cinder Pool, in Norris Geyser Basin (left), with yellow cinders from an unnamed pool in the West Nymph Creek thermal area (right). The Cinder Pool cinders are black due to finely dispersed pyrite, whereas the yellow color of cinders from the West Nymph Creek pool is due to the lack of pyrite.
A comparison of black cinders from Cinder Pool, in Norris Geyser Basin (left), with yellow cinders from an unnamed pool in the West Nymph Creek thermal area (right). The Cinder Pool cinders are black due to finely dispersed pyrite, whereas the yellow color of cinders from the West Nymph Creek pool is due to the lack of pyrite.
Map showing earthquake focal mechanisms in the Yellowstone region.
Map showing earthquake focal mechanisms in the Yellowstone region.
Describing work that USGS does to students at the Women In Science Conference
Describing work that USGS does to students at the Women In Science Conference
Image of the western face of Mount Moran. Note the dark stripe that marks a mafic intrusion (the “diabase dike”) and the vestiges of the Cambrian-aged Flathead Sandstone Formation (about 50 vertical feet in thickness) at the summit.
Image of the western face of Mount Moran. Note the dark stripe that marks a mafic intrusion (the “diabase dike”) and the vestiges of the Cambrian-aged Flathead Sandstone Formation (about 50 vertical feet in thickness) at the summit.