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tunnel valley

A Dictionary of Earth Sciences | 1999 | | Copyright

tunnel valley A valley cut by a subglacial stream escaping from beneath an ice sheet. It is well developed in Denmark (where such valleys are called ‘tunneldale’) and in Germany (‘Rinnentaler’). Individual examples may be up to 75 km long and up to 100 m deep, with steep sides and flat floors. The long profile may be irregular, as a result of water under pressure being locally forced uphill, and so the valley may now be occupied by a string of lakes (‘ribbon lakes’).

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AILSA ALLABY and MICHAEL ALLABY. "tunnel valley." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 31 May. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "tunnel valley." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 31, 2012). http://www.encyclopedia.com/doc/1O13-tunnelvalley.html

AILSA ALLABY and MICHAEL ALLABY. "tunnel valley." A Dictionary of Earth Sciences. 1999. Retrieved May 31, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-tunnelvalley.html

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tunnel valley

A Dictionary of Ecology | 2004 | | Copyright

tunnel valley A valley cut by a subglacial stream escaping from beneath an ice sheet. It is well developed in Denmark (where such valleys are called tunneldale) and in Germany (Rinnentaler). Individual examples may be up to 75 km long and 100 m deep, with steep sides and flat floors. The long profile may be irregular, as a result of water under pressure being locally forced uphill, and so the valley may now be occupied by a string of lakes (‘ribbon lakes’).

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MICHAEL ALLABY. "tunnel valley." A Dictionary of Ecology. 2004. Encyclopedia.com. 31 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "tunnel valley." A Dictionary of Ecology. 2004. Encyclopedia.com. (May 31, 2012). http://www.encyclopedia.com/doc/1O14-tunnelvalley.html

MICHAEL ALLABY. "tunnel valley." A Dictionary of Ecology. 2004. Retrieved May 31, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O14-tunnelvalley.html

Learn more about citation styles

Free newspaper and magazine articles

	Reopen Valleys tunnels call.(News) Newspaper article from: South Wales Echo (Cardiff, Wales); 3/29/2010
	Construction of the 8.8km Lowari tunnel, which will improve connections... Magazine article from: International Railway Journal; 11/1/2005
	The Postemployment Economy: If developed nations are to survive the... Magazine article from: The Futurist; 9/1/2010