glaciers

outlet glacier

a valley glacier which drains an inland ice sheet or ice cap and flows through a gap in peripheral mountains.
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outburst flood

any catastrophic flooding from a glacier; may originate from trapped water in cavities inside a glacier or at the margins of glaciers or from lakes that are dammed by flowing glaciers.
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ogives

alternate bands of light and dark ice seen on a glacier surface.
Ogives, Juno Icefield, Alaska
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nunatak

a rocky crag or small mountain projecting from and surrounded by a glacier or ice sheet.
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niche glacier

very small glacier that occupies gullies and hollows on north-facing slopes (northern hemisphere); may develop into cirque glacier if conditions are favorable.
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negative mill

a geyser; a fountain that develops when water from a conduit is forced up to the surface of a glacier.
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mountain glacier

a glacier that is confined by surrounding mountain terrain; also called an alpine glacier.
Muddy River Glacier carves its way through forested mountains near Frederick Sound in southeast Alaska. Typical of mountain glaciers, it is constrained on all sides by mountainous terrain. (Photo courtesy of the U. S. Navy, archived at the World Data Center for Glaciology, Boulder, CO.)
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moulin

a nearly vertical channel in ice that is formed by flowing water; usually found after a relatively flat section of glacier in a region of transverse crevasses; also called a pothole.
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moraine shoal

glacial moraine that has formed a shallow place in water.
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moraine

a mound, ridge, or other distinct accumulation of glacial till.
Lateral and terminal moraines of a valley glacier, Bylot Island, Canada. The glacier formed a massive sharp-crested lateral moraine at the maximum of its expansion during the Little Ice Age. The more rounded terminal moraine at the front consists of medial moraines that were created by the...
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