Mount Fairweather , the range's highest peak, stands at 15,320 feet. Near Johns Hopkins Inlet , several peaks rise from sea level to 6,520 feet within just four miles of shore. The great glaciers of the past carved these fjords , or drowned valleys , out of the mountains like great troughs. Landslides help widen the troughs as the glaciers remove the bedrock support on upper slopes. Huge icebergs may last a week or more, and they provide perches for bald eagles, cormorants, and gulls.
Blue bergs are dense.
Greenish-blackish bergs may have calved off glacier bottoms. Dark-striped brown bergs carry morainal rubble from the joining of tributary glaciers or other sources. How high a berg floats depends upon its size, the ice's density, and the water's density. Bergs may be weighed down, submerged even, by rock and rubble.