Filters: Tags: Ferrians, O.J. Collection (X)
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Ice wedge (ground ice) in permafrost exposed by placer mining near Livengood, about 50 miles northwest of Fairbanks, Alaska. Photo by T.L. Pewe. September 1949.
Categories: Image;
Tags: Alaska,
Ferrians, O.J. Collection,
Permafrost,
Photographers,
Placer Mining,
Album caption: Roadhouse, mile 278.5, Richardson Highway. The structure is distorted because of thawing of the underlying ice-rich permafrost in fine-grained silts and sands. Gulkana district. Copper River region, Alaska, May 29, 1962. (Photograph by T.L. Pewe) Published as figure 33 in U.S. Geological Survey Professional Paper 678, 1969.
Categories: Image;
Tags: Alaska,
Copper Rivers Region, Alaska,
Ferrians, O.J. Collection,
Gulkana district, Alaska,
Photographers,
Frost-heaved steel-pile bridge spanning North Fork at about milepost 120 on the Kougarok Highway. Alaska. Photo by G.D. Eberlein. 1955. Figure 32, U.S. Geological Survey Professional paper 678.
Categories: Image;
Tags: Alaska,
Ferrians, O.J. Collection,
Kougarok Highway, Alaska,
Photographers,
photo print
Differential subsidence of the road bed of the standard gauge Copper River and Northwestern Railway near Strelna, 75 miles northeast of Valdez, Alaska. The thermal equilibrium of the fine grained sediments underlying the road bed was disrupted during construction, and the permafrost started to thaw differentially. Maintenance and use of the railroad was discontinued in 1938. Subsidence, as well as lateral displacement, has continued. September 1960. Figure 20, U.S. Geological Survey Professional paper 678.
Gravel road showing severe differential subsidence caused by thawing of ice-wedge polygons in permafrost, near Umiat, Alaska. August 1958. Figure 25, U.S. Geological Survey Professional paper 678.
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