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Blue skies over the Trinity Basin in the Alaska Range. This region is the accumulation area for both the Black Rapids and Susitna Glaciers. The Mountains here are completely draped in ice and snow at about 8000 ft. in elevation. This area has been extensively studied for mass balance since 1972, primarily because Black Rapids is a surge-type glacier, last surging in 1936-1937 when the terminus of the glacier advanced rapidly at nearly 220 feet per day, approaching the Delta River. The Susitna Glacier, also originating in this icefield last surged in 1953.

Photo Information

CameraNikon NIKON D7000 (Current model NIKON D7500)
LensAF-S DX VR Zoom-Nikkor 18-105mm f/3.5-5.6G ED
Focal Length18.0 mm (27.0 mm in 35mm)
Aperturef/4.5
Exposure Time0.0008s (1/1250)
ISO250

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