Drilling for mineral resources near Canyonlands National Park, Utah
Drilling for mineral resources near Canyonlands National Park, UtahDrilling for mineral resources near Canyonlands National Park, Utah
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Drilling for mineral resources near Canyonlands National Park, Utah
Drilling for mineral resources near Canyonlands National Park, Utah
Island night lizard on San Nicolas Island (May 2007).
Island night lizard on San Nicolas Island (May 2007).
Tamarisk plants have been sucessful in southwestern US river- and stream-side habitats, in part because of its ablity to make many flowers and, therefore, seeds.
Tamarisk plants have been sucessful in southwestern US river- and stream-side habitats, in part because of its ablity to make many flowers and, therefore, seeds.
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
Nonnative tamarisk is resistant to wildfire, in part due to its ability to resprout
Nonnative tamarisk is resistant to wildfire, in part due to its ability to resprout
Nonnative tamarisk is resistant to wildfire, in part because of its ablity to re-sprout.
Nonnative tamarisk is resistant to wildfire, in part because of its ablity to re-sprout.
A tan colored Island Night Lizard on San Nicolas Island. Photo by Charles Drost, USGS.
A tan colored Island Night Lizard on San Nicolas Island. Photo by Charles Drost, USGS.
A lab photo of Humpback Chub specimen in tank
A lab photo of Humpback Chub specimen in tank
Repeat photograph of Tsegi Canyon, Laguna Creek, northern Arizona, north of Rt. 160, taken by Dr. Robert Webb, USGS, in 2005. The original photograph in this series was taken in 1927 J.J. Hanks. The series is from the SBSC's Southwest Repeat Photography Collection, stake (camera point) s4821.
Repeat photograph of Tsegi Canyon, Laguna Creek, northern Arizona, north of Rt. 160, taken by Dr. Robert Webb, USGS, in 2005. The original photograph in this series was taken in 1927 J.J. Hanks. The series is from the SBSC's Southwest Repeat Photography Collection, stake (camera point) s4821.
Repeat photograph of Tsegi Canyon, Laguna Creek, northern Arizona, north of Rt. 160, taken by Dr. Robert Webb, USGS, in 2005. The original photograph in this series was taken in 1927 J.J. Hanks. This photo is a repeat photographic match taken in color to a B/W photo, both in 2005.
Repeat photograph of Tsegi Canyon, Laguna Creek, northern Arizona, north of Rt. 160, taken by Dr. Robert Webb, USGS, in 2005. The original photograph in this series was taken in 1927 J.J. Hanks. This photo is a repeat photographic match taken in color to a B/W photo, both in 2005.
A discrete water sample is collected from one of Lake Powell's Reservoir's main inflows. The Van Dorn water sampler pictured here is lowered to the desired depth and then triggered to close using a small metal weight. Photo by SBSC, 2005.
A discrete water sample is collected from one of Lake Powell's Reservoir's main inflows. The Van Dorn water sampler pictured here is lowered to the desired depth and then triggered to close using a small metal weight. Photo by SBSC, 2005.
San Nicolas Island coastline with a calm sea and flowering shrubs. San Nicolas Island is one of the Channel Islands off the coast of southern California. The endemic Island Night Lizard is found only on the Channel Islands.
San Nicolas Island coastline with a calm sea and flowering shrubs. San Nicolas Island is one of the Channel Islands off the coast of southern California. The endemic Island Night Lizard is found only on the Channel Islands.
Intact biological soil crusts (biocrusts) in Canyonlands National Park. Photo taken by Jayne Belnap, USGS, 2004.
Intact biological soil crusts (biocrusts) in Canyonlands National Park. Photo taken by Jayne Belnap, USGS, 2004.
View of Colorado River confluence with the Little Colorado River taken from the rim of Marble Canyon
View of Colorado River confluence with the Little Colorado River taken from the rim of Marble Canyon
This repeat photograph was taken in 2002 by USGS along the Colorado River and is a match of a historic image by E.C. LaRue from the 1923 Birdseye Expedition through Grand Canyon. The Birdseye Expedition surveyed a 251-mile stretch of the Colorado River from Lees Ferry to Diamond Creek.
This repeat photograph was taken in 2002 by USGS along the Colorado River and is a match of a historic image by E.C. LaRue from the 1923 Birdseye Expedition through Grand Canyon. The Birdseye Expedition surveyed a 251-mile stretch of the Colorado River from Lees Ferry to Diamond Creek.
Downstream view of Colorado River at its confluence with the Little Colorado River
Downstream view of Colorado River at its confluence with the Little Colorado River
Four-wheel drive enthusiasts during Jeep Safari in Moab Utah.
Four-wheel drive enthusiasts during Jeep Safari in Moab Utah.
What and Where Are Biological Soil Crusts?
What and Where Are Biological Soil Crusts?
Fish seining efforts on the Colorado River
Hoop fishing net deployed on the Little Colorado River just downstream of a travetine fall
Hoop fishing net deployed on the Little Colorado River just downstream of a travetine fall
Repeat photograph of the San Pedro River valley, near St. David, southern AZ. This photo was taken in 1994 by Dr. Robert Webb, USGS, as a repeat photograph of the 1981 Roskruge image and 1962 J.R. Hastings image. The image series is from the SBSC's Southwest Repeat Photography Collection, stake (camera point) s0151.
Repeat photograph of the San Pedro River valley, near St. David, southern AZ. This photo was taken in 1994 by Dr. Robert Webb, USGS, as a repeat photograph of the 1981 Roskruge image and 1962 J.R. Hastings image. The image series is from the SBSC's Southwest Repeat Photography Collection, stake (camera point) s0151.