Rock glaciers — streams of rocks, held together with ice, that creep or flow downhill each year — can be found in the Brooks and Alaska ranges and in the Wrangell Mountains, says science writer Ned Rozell.
Sourdough rock glacier is one of several in the mountainous area near McCarthy, Alaska. This photo was taken during a wilderness classic ski race in April 2009.
Late for a meeting with scientists, I kept hiking in the direction of the bear. A few minutes later, as I clung to a rock wall where the valley narrowed to a canyon, I had a feeling I was being watched. There, staring at me less than 20 feet away, was a glaciologist. That glacier, named Fireweed, sprawls on the 30-square-mile bulk of Fireweed Mountain near McCarthy. Fireweed rock glacier consists of three lobes of rock merging to become one long tongue. The tip of that tongue broke off in 1993.
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