| Crevasses: Open because of an acceleration of the glacier. They are seldom more than 100 feet deep in the North Cascades.top of page |
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The Ablation Zone is the section of the glacier where melting dominates. By the end of the summer this area is exposed glacier ice. top of page |
| The Accumulation Zone is the zone of the glacier where snowfall exceeds snowmelt. top of page |  |
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An Icefall is an area of rapid movement on a steep slope with extensive open crevassing. top of page |
| A Moraine is a pile of debris carried down glacier and dumped at its end-terminus or lateral margin. top of page |  |
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A Stagnant Glacier is a glacier that is not moving significantly, notice lack of crevassing. top of page |
| An Active Glacier is moving at reasonable pace has crevassing and is eroding its bed. top of page |  |
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Glacier Runoff such as this waterfall from the Colonial Glacier is the melt from the entire glacier. It is highest on warm dry days when runoff from other sources is at its lowest. top of page |
| Glacier Flour causes the blue green color in this Lake on Mt. Daniels. The flour is clay sized particle resulting from the glacier eroding the rock at its base. top of page | 
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Crevasse Stratigraphy Like reading tree rings the annual snow layers are visible in crevasses and can be used to determine annual snow accumulation. top of page |
| Lateral Moraines mark the edges of a glacier. In this case the lateral moraines extend well below the terminus of the current Kennedy Glacier, marking its maximum size in the Little Ice Age. top of page |
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Terminus is the end of the glacier. top of page |
| Proglacial Lake is a lake beyond the terminus of a glacier. top of page |
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Channel cut by Supraglacial stream on the Rainbow Glacier top of page |
| Glacier golf is a game played with rocks and sticks across rough alpine terrain. 1995 Mt. Daniels Open. Eventual Champion Bill Prater left examines form of Maura Pelto about too tee off over the water hazard. top of page |  |
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Ice Worms live on glaciers appearing largely in the evening when solar radiation is at a minimum. We found that over a billion ice worms inhabit a single glacier. top of page |
| Collembola- Springtails-Snow fleas: Most
species of Collembola found on glaciers of the North Cascades are also
found off glaciers, on snowpack, on pools of water, or in duff in the
forest. At least one kind of Collembola (here referred to as the
"Behemoth" (Agrenia n.sp.)) appears to occur only on the
glaciers of our region -- not off glaciers, and not in other regions. . top of page |
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