Ruth Glacier is a

glacier A glacier (; or ) is a persistent body of dense ice, a form of rock, that is constantly moving downhill under its own weight. A glacier forms where the accumulation of snow exceeds its ablation over many years, often centuries. It acquires ...

Denali National Park and Preserve Denali National Park and Preserve, formerly known as Mount McKinley National Park, is a List of national parks of the United States, United States national park and National preserve, preserve located in Interior Alaska, centered on Denali (feder ...

in the

U.S. state In the United States, a state is a constituent political entity, of which there are 50. Bound together in a political union, each state holds governmental jurisdiction over a separate and defined geographic territory where it shares its so ...

Alaska Alaska ( ) is a non-contiguous U.S. state on the northwest extremity of North America. Part of the Western United States region, it is one of the two non-contiguous U.S. states, alongside Hawaii. Alaska is also considered to be the north ...

. Its upper reaches are approximately 3 vertical miles below the summit of

Denali Denali (), federally designated as Mount McKinley, is the highest mountain peak in North America, with a summit elevation of above sea level. It is the tallest mountain in the world from base to peak on land, measuring . On p. 20 of Helm ...

. The glacier's "Great Gorge" is one mile wide, and drops almost over , with

crevasse A crevasse is a deep crack that forms in a glacier or ice sheet. Crevasses form as a result of the movement and resulting stress associated with the shear stress generated when two semi-rigid pieces above a plastic substrate have different rate ...

s along the surface. Above the surface on both sides are

granite Granite ( ) is a coarse-grained (phanerite, phaneritic) intrusive rock, intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly coo ...

cliffs. From the top of the cliffs to the bottom of the glacier is a height exceeding that of the

Grand Canyon The Grand Canyon is a steep-sided canyon carved by the Colorado River in Arizona, United States. The Grand Canyon is long, up to wide and attains a depth of over a mile (). The canyon and adjacent rim are contained within Grand Canyon Nati ...

. Ruth Glacier moves at a rate of per day and was measured to be thick in 1983. Surrounding the Ruth Gorge are many mountains of the

Alaska Range The Alaska Range is a relatively narrow, mountain range in the Southcentral Alaska, southcentral region of the U.S. state of Alaska, from Lake Clark at its southwest endSources differ as to the exact delineation of the Alaska Range. ThBoard on G ...

, including the

Mooses Tooth The Moose's Tooth (or simply Moose's Tooth, Mooses Tooth) is a rock peak on the east side of the Ruth Glacier, Ruth Gorge in the Central Alaska Range, 15 miles (24 km) southeast of Denali. Despite its relatively low elevation, it is a diff ...

, Mount Dickey, Mount Bradley, Mount Wake, Mount Johnson, and London Tower with highly technical

ice Ice is water that is frozen into a solid state, typically forming at or below temperatures of 0 ° C, 32 ° F, or 273.15 K. It occurs naturally on Earth, on other planets, in Oort cloud objects, and as interstellar ice. As a naturally oc ...

and

rock Rock most often refers to: * Rock (geology), a naturally occurring solid aggregate of minerals or mineraloids * Rock music, a genre of popular music Rock or Rocks may also refer to: Places United Kingdom * Rock, Caerphilly, a location in Wale ...

climbs on their faces. According to the

National Park Service The National Park Service (NPS) is an List of federal agencies in the United States, agency of the Federal government of the United States, United States federal government, within the US Department of the Interior. The service manages all List ...

(NPS), several air taxi operators are authorized to land aircraft on Ruth Glacier in Denali National Park.

History

In 1903, the glacier was explored by physician and ethnographer

Frederick Cook Frederick Albert Cook (June 10, 1865 – August 5, 1940) was an American explorer, physician and ethnographer, who is most known for allegedly being the first to reach the North Pole on April 21, 1908. A competing claim was made a year l ...

, who named it after his youngest daughter. A 2024 open licence research project estimated the Grand Gorge to be the deepest in north America at .

References

Glaciers of Matanuska-Susitna Borough, Alaska Glaciers of Denali National Park and Preserve Denali Glaciers of Alaska {{Alaska-glacier-stub

History

See also

References