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25 January 2017

Columbia Glacier, Alberta 3 km Retreat 1986-2015

Comparison of Columbia Glacier, which is the glacier flowing into the lake at top in 1986 and 2015 Landsat images. The red arrow is the 1986 terminus, yellow arrow the 2015 terminus position and purple arrow the tributary. The Columbia Glacier drains the northwest side of Columbia Icefield into the Athabasca River in Alberta. The glacier in 1964 was 8.5 km long, by 1980 9.5 km long and in 2015 6.2 …

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23 June 2011

Retreat of Columbia Glacier, Columbia Icefield, Canada

The Columbia Glacier drains west from Columbia Icefield into Alberta. The glacier in 1964 was 8.5 km long, by 1980 9.5 km long and in 2009 6.5 km long. The glacier drops rapidly from the plateau area over a major ice fall, which created a series of ogives, as seen in this 1964 Austin Post (USGS) photograph. Ogives are annual wave bulges that form at the base of an icefall …

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