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North Cascades National Park, Washington. East side of Mount Shuksan, viewed from Ruth Mountain. Mount Baker in the distance. Circa 1966.
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North Cascades National Park, Washington. Falls cascade down a narrow chute in phyllite just south of Berdeen Lake. Circa 1967. Figure 16-C, U.S. Geological Survey Bulletin 1359.
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North Cascades National Park, Washington. Glaciers at the head of Luna Creek in Picket Range. This complex of ice patches illustrates the difficulty of counting and classifying individual glaciers. A glacier fed by ice avalanches ends in Luna Lake on the left. Avalanches from the large irregular hanging glacier that clings to the cliffs feed the debris-covered ice upslope from another lake (foreground, right center). A small ice patch fed by snow avalanches lies at the base of the cliffs in right center. September 27, 1960. Plate 3-D, U.S. Geological Survey Professional paper 705-A. 1971.
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North Cascades National Park, Washington. Swirled banded gneiss made up of layers of dark and light-colored biotite quartz gneiss. The white rock, under the pick handle and in the upper left corner, is light-colored diorite. View is from the south ridge of Davis Peak. Circa 1967. Figure 5-A, U.S. Geological Survey Bulletin 1359.
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Chickamin Glacier, on the eastern slopes of Dome Peak (2,723 m). This composite valley glacier (left) and slope glacier (right) demonstrates the variations that can take place even in a single ice mass. The tongue at the left has retreated since observations began in 1955, but the terminus on steep cliffs on the right advanced rapidly in the early 1950's and has remained little changed since then. Glacier Peak Wilderness, Skagit County, Washington. September 23, 1965. Published as plate 3-F in U.S. Geological Survey. Professional paper 705-A. 1971.
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North Cascades National Park, Washington. North Big Bosom Butte near Silesia Creek. The butte is made up of volcanic breccia of the Hannegan Pass Volcanics. Circa 1966.
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North Cascades National Park, Washington. Peak north of Hells Gorge, showing the contact of the Hannegan Pass Volcanics overlapping the granodiorite of the Chilliwack batholith. Circa 1966.
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Climate change influences apex predators in complex ways, due to their important trophic position, capacity for resource plasticity, and sensitivity to numerous anthropogenic stressors. Bald eagles, an ecologically and culturally significant apex predator, congregate seasonally in high densities on salmon spawning rivers across the Pacific Northwest. One of the largest eagle concentrations is in the Skagit River watershed, which connects the montane wilderness of North Cascades National Park to the Puget Sound. Using multiple long-term datasets, we evaluated the relationship between local bald eagle abundance, chum and coho salmon availability and phenology, and the number and timing of flood events in the Skagit...
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Comma-separated values (.csv) file containing data related to mercury concentrations in dragonfly samples from U.S. National Parks collected as part of the Dragonfly Mercury Project (DMP). First posted - September 14, 2018 Revised - October 18, 2019, ver. 2.0 Revised - February 4, 2020, ver. 3.0 Revised - October 28, 2020, ver. 4.0
Categories: Data, Data Release - Revised; Tags: Acadia National Park, Allegheny Portage Railroad National Historic Site, Apostle Islands National Lakeshore, Appomattox Court House National Historical Park, Battle Creek Cypress Swamp, All tags...
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Unnamed glacier at the head of May Creek on Jack Mountain (2,721 m). This active glacier is east of the rain shadow formed by the Picket Range. Only small glaciers can be seen on the mountains in the background, many of which exceed 2,700 m in altutude. Pasayten Wilderness, Whatcom County, Washington. September 20, 1966. Published as plate 3-H in U. S. Geological Survey. Professional paper 705-A. 1971.
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North Cascades National Park, Washington. Sheared quartz diorite of the Chilliwack composite batholith forms the western buttress of Whatcom Peak to the northwest of Perfect Pass. Lighter-colored granodiorite underlies the mountain in the left foreground. Circa 1967. Figure 14, U.S. Geological Survey Bulletin 1359.
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North Cascades National Park, Washington. Mount Despair forms a jagged horn in the southern part of this area. Circa 1967. Figure 16-B, U.S. Geological Survey Bulletin 1359.
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North Cascades National Park, Washington. Northeast side of Mount Largo rising above thickly forested Ptarmigan Creek. Circa 1966. Figure 2, U.S. Geological Survey Bulletin 1325.
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North Cascades National Park, Washington. Numerous crevasses on Challenger Glacier. The top of Mount Challenger is on the right, and Luna Peak is the prominent horn in the left background. Circa 1967. Figure 17-B, U.S. Geological Survey Bulletin 1359.
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North Cascades National Park, Washington. Rocks of the Chilliwack composite batholith. An alaskite body (white) intrudes granodiorite on the south side of Bear Mountain. Circa 1967. Figure 15 A, U.S. Geological Survey Bulletin 1359.
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North Cascades National Park, Washington. Klawatti (center) and North Klawatti (right) Glaciers, north of Eldorado Peak. These glaciers have exhibited striking and diverse changes in recent years although they are closely adjacent. In 1947, stagnant ice from both glaciers covered the area of Klawatti Lake. At that time Klawatti Glacier ended on the steep cliff which it now descends in a spectacular icefall. Since 1947, the ice in the basin has melted. The lake, now 1 kilometer in length, has formed, and the Klawatti Glacier has advanced down the cliff. Meanwhile the lower part of North Klawatti Glacier has continued to thin. August 2, 1969. Plate 3-B, U.S. Geological Survey Professional paper 705-A. 1971.
USGS and NPS biologists used distance sampling to estimate abundance of hoary marmots (Marmota caligata) in North Cascades National Park, Washington, USA during 2007-2008 and 2016-2017. Biologists resurveyed hoary marmots in 2016 and 2017 at 78 point-count stations across 19 sites surveyed by NPS in 2007-2008. Data include marmot detection distances and survey conditions used to estimate abundances at each site in each year. Data also include estimated marmot abundances and covariates used to evaluate effects of weather, snowpack, and vegetative phenology and productivity on marmot abundances. Marmots are classified as adult, subadult, or juvenile for observations in which age was evident.
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North Cascades National Park, Washington. Thin-bedded plagioclase arkose on the ridge north of Wildcat Mountain. Circa 1966. Figure 9, U.S. Geological Survey Bulletin 1325.
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North Cascades National Park, Washington. Custer Gneiss overlain by Skagit Volcanics on the west side of a spur of Glacier Peak. Circa 1967. Figure 3, U.S. Geological Survey Bulletin 1359.
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North Cascades National Park, Washington. Boston Glacier. This largest single glacier in the North Cascades occupies a broad cirque northwest of Buckner Mountain (2,777 meters). Its terminus advanced rapidly between 1950 and 1955, and its area increased 17 percent during this period. September 27, 1960. Plate 3-E, U.S. Geological Survey Professional paper 705-A. 1971.


map background search result map search result map North Cascades National Park, Washington. Klawatti (center) and North Klawatti (right) Glaciers, north of Eldorado Peak. North Cascades National Park, Washington. Glaciers at the head of Luna Creek in Picket Range. 1960. North Cascades National Park, Washington. Boston Glacier. This largest single glacier in the North Cascades occupies a broad cirque northwest of Buckner Mountain (2,777 meters). 1960. North Cascades National Park, Washington. Northeast side of Mount Largo rising above thickly forested Ptarmigan Creek. North Cascades National Park, Washington. Thin-bedded plagioclase arkose on the ridge north of Wildcat Mountain. North Cascades National Park, Washington. North Big Bosom Butte near Silesia Creek. The butte is made up of volcanic breccia of the Hannegan Pass Volcanics. North Cascades National Park, Washington. Peak north of Hells Gorge, showing the contact of the Hannegan Pass Volcanics overlapping the granodiorite of the Chilliwack batholith. North Cascades National Park, Washington. East side of Mount Shuksan, viewed from Ruth Mountain. North Cascades National Park, Washington. Custer Gneiss overlain by Skagit Volcanics on the west side of a spur of Glacier Peak. North Cascades National Park, Washington. Swirled banded gneiss made up of layers of dark and light-colored biotite quartz gneiss. North Cascades National Park, Washington. Sheared quartz diorite of the Chilliwack composite batholith forms the western buttress of Whatcom Peak to the northwest of Perfect Pass. North Cascades National Park, Washington. Rocks of the Chilliwack composite batholith. An alaskite body (white) intrudes granodiorite on the south side of Bear Mountain. North Cascades National Park, Washington. Mount Despair forms a jagged horn in the southern part of this area. North Cascades National Park, Washington. Falls cascade down a narrow chute in phyllite just south of Berdeen Lake. North Cascades National Park, Washington. Numerous crevasses on Challenger Glacier. The top of Mount Challenger is on the right, and Luna Peak is the prominent horn in the left background. Biological and Hydrological Data from the Skagit River Ecosystem, Washington, USA 1968-2016 Total Mercury Concentrations in Dragonfly Larvae from U.S. National Parks Hoary Marmot Abundance in North Cascades National Park 2007-2008 and 2016-2017 North Cascades National Park, Washington. Klawatti (center) and North Klawatti (right) Glaciers, north of Eldorado Peak. North Cascades National Park, Washington. Glaciers at the head of Luna Creek in Picket Range. 1960. North Cascades National Park, Washington. Boston Glacier. This largest single glacier in the North Cascades occupies a broad cirque northwest of Buckner Mountain (2,777 meters). 1960. North Cascades National Park, Washington. Northeast side of Mount Largo rising above thickly forested Ptarmigan Creek. North Cascades National Park, Washington. Thin-bedded plagioclase arkose on the ridge north of Wildcat Mountain. North Cascades National Park, Washington. North Big Bosom Butte near Silesia Creek. The butte is made up of volcanic breccia of the Hannegan Pass Volcanics. North Cascades National Park, Washington. Peak north of Hells Gorge, showing the contact of the Hannegan Pass Volcanics overlapping the granodiorite of the Chilliwack batholith. North Cascades National Park, Washington. East side of Mount Shuksan, viewed from Ruth Mountain. North Cascades National Park, Washington. Custer Gneiss overlain by Skagit Volcanics on the west side of a spur of Glacier Peak. North Cascades National Park, Washington. Swirled banded gneiss made up of layers of dark and light-colored biotite quartz gneiss. North Cascades National Park, Washington. Sheared quartz diorite of the Chilliwack composite batholith forms the western buttress of Whatcom Peak to the northwest of Perfect Pass. North Cascades National Park, Washington. Rocks of the Chilliwack composite batholith. An alaskite body (white) intrudes granodiorite on the south side of Bear Mountain. North Cascades National Park, Washington. Mount Despair forms a jagged horn in the southern part of this area. North Cascades National Park, Washington. Falls cascade down a narrow chute in phyllite just south of Berdeen Lake. North Cascades National Park, Washington. Numerous crevasses on Challenger Glacier. The top of Mount Challenger is on the right, and Luna Peak is the prominent horn in the left background. Hoary Marmot Abundance in North Cascades National Park 2007-2008 and 2016-2017 Biological and Hydrological Data from the Skagit River Ecosystem, Washington, USA 1968-2016 Total Mercury Concentrations in Dragonfly Larvae from U.S. National Parks