The words Förde, fjord and fjard are of the same origin as the English word firth, but today there are differences in the meaning between firth (Förde) and fjord in general.
Europe during Weichselian- & Würm-Glaciation
When the area of the present Baltic Sea was covered by an ice sheet during the Weichselian glaciation, about 20,000 to 70,000 years ago, the edge of the ice moved on land as tongues of glaciers; these carved out channels. When the ice retreated it created a large lake. The water level rose and the channels were filled by water. The material removed formed moraine hills near the sides and ends of the channels.
Some of these Förden and fjorde are believed not to have been carved out by the ice directly, but to have been washed out by flows of water below the ice (tunnel valleys). Alternatively they have been interpreted as 'beheaded' river channels preserved beside a tideless sea.
Fjorde of East Jutland and Förden of Schleswig-Holstein
The present day firths of this region includes:
Langerak: Length 32 km. Eastern part of Limfjord, really a strait with eastern entrance from Kattegat and western communication to the other parts of Limfjord, which are rather lagoons.
Als Fjord: Length 12 km, prolonged to 20 km by Augustenborg Fjord (8 km). In addition to the main entrance from the north, there is a narrow second entrance called Als Sund; the blind end is Augustenborg Fjord.
The inner part of Flensburger Förde has been used as a harbour since the Middle Ages.
Flensburg Firth, in German Flensburger Förde, in Danish Flensborg Fjord: It is the largest of these bays (length 40 or 50 km), and reaches farthest west.
Schlei, in Danish Slien: Length 40 – 42 km. The narrowest German Förde.
Eckernförde Bay, in German Eckernförder Bucht, in Danish Egernførde Bugt: The component -förde in the name of the city has been considered by some authors to reference a ford and by others to a fjord.
Kieler Förde: Geologically larger than nominally, as a part of the large Kiel Bay belongs geographically to Kieler Förde.
The lake Hemmelsdorfer See is a former Förde.
Traveförde is now partly filled up by sand. The residual part is called Pötenitzer Wiek and connects to the sea only by the estuary of the Trave river.
Geologically, a fjord or fiord ( (listen), (listen)) is a long, narrow inlet with steep sides or cliffs, created by a glacier. There are many fjords on the coasts of Alaska, Antarctica, British Columbia, Chile, Greenland, the Faroe Islands, Iceland, Kamchatka, the Kerguelen Islands, New Zealand, Norway, Novaya Zemlya, Labrador, Nunavut, Newfoundland, Quebec, Scotland, South Georgia Island, and Washington state. Norway's coastline is estimated at 29,000 kilometres (18,000 mi) with nearly 1,200 fjords, but only 2,500 kilometres (1,600 mi) when fjords are excluded.
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