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Closer view of the glacier in the winter A glacier cave under Mendenhall Glacier. Mendenhall Glacier (Tlingit: Áakʼw Tʼáak Sítʼ) is a glacier about 13.6 miles (21.9 km) long located in Mendenhall Valley, about 12 miles (19 km) from downtown Juneau in the southeast area of the U.S. state of Alaska. [2]
An ice cave is any type of natural cave (most commonly lava tubes or limestone caves) that contains significant amounts of perennial (year-round) ice. At least a portion of the cave must have a temperature below 0 °C (32 °F) all year round, and water must have traveled into the cave’s cold zone.
The ice formations in the cave were formed by thawing snow which drained into the cave and froze during winter. [4] Since the entrance to the caves is open year-round, chilly winter winds blow into the cave and freeze the snow inside. In summer, a cold wind from inside the cave blows toward the entrance and prevents the formations from melting.
Salt caves - caves formed within rock salt by dissolution. [13] Fracture caves - caves formed in the fractures inside a larger rock unit. [14] Glacial caves - caves formed within glacial ice. [15] Lava caves - caves formed in volcanic rock. [16] Lava tubes - primary caves formed as lava conduits during volcanic eruptions. [17]
The Mendenhall is about six miles (9 kilometers) long, one mile (1.6 km) of which is whitewater. The most favorable months in which to raft on the river is May through September. The most active points along the whitewater section are Scott's Iatola (or Iatolla ) Hola , Tourist Trap , and Pinball Alley .
Mendenhall Lake is a proglacial lake in the Mendenhall Valley at the 1962 terminus of Mendenhall Glacier, three miles (4.8 km) north of the Juneau Airport in the Coast Mountains. It is the source of the short Mendenhall River. [1] The lake is included in the Mendenhall Glacier Recreation Area of the Tongass National Forest. [2]
This page was last edited on 25 November 2024, at 03:16 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
View of the Juneau Icefield. The Juneau Icefield is an ice field located just north of Juneau, Alaska, continuing north through the border with British Columbia, [1] extending through an area of 3,900 square kilometres (1,500 sq mi) in the Coast Range ranging 140 km (87 mi) north to south and 75 km (47 mi) east to west.