Wikipedia:POTD column/February 28, 2006

In English usage a fjord is a narrow inlet of the sea between cliffs or steep slopes, which results from marine inundation of a glaciated valley. Fjords are found in locations where current or past glaciation extended below current sea level. The fractal coastline of eastern Greenland, seen here, has many fjords. At the bottom is the longest fjord in the world, Scoresby Sund.

Photo credit: NASA
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