A steephead valley, steephead or blind valley is a deep, narrow, flat bottomed valley with an abrupt ending. Such closed valleys may arise in limestone or karst landscapes, where a layer of permeable rock lies above an impermeable substract such as marl. Water flowing through a steephead valley leaves via one or more ponors[1] or sinkholes.
The Reculée de Baume
Blind valleys are typically dry at their lower ends.[2] If the ponor cannot contain the high runoff during a flood event an intermittent flow may continue through the valley beyond the sink. Such a landform is called a semi-blind or half-blind valley.[3]
They are created by a stream flowing within the permeable rock and eroding it from within, until the rock above collapses opening up a steep narrow valley which is then further eroded by the stream running across the impermeable valley floor.[citation needed] At the head of the valley the stream emerges from the rock as a spring. Notable examples can be found in the Jura region of France, for example the Reculée de Baume at Baume-les-Messieurs and the Reculée d'Arbois with its head at Les Planches-près-Arbois and its exit at Arbois.
In North America, blind valleys (the preferred American term) are found in the Driftless Area and other karst regions.
^Gutiérrez, Francisco; Mateo Gutiérrez (2016). Landforms of the Earth: An Illustrated Guide. Springer. p. 68. ISBN9783319269474. Retrieved 26 November 2016.
^Heggen, Richard (2015). Underground Rivers: From the River Styx to the Rio San Buenaventura, with occasional diversions. Richard Heggen. p. 647. Retrieved 26 November 2016.
^Huggett, Richard J. (2003). Fundamentals of Geomorphology. Psychology Press. p. 152. ISBN0415241464. Retrieved 26 November 2016.
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steephead, valley, steephead, valley, steephead, blind, valley, deep, narrow, flat, bottomed, valley, with, abrupt, ending, such, closed, valleys, arise, limestone, karst, landscapes, where, layer, permeable, rock, lies, above, impermeable, substract, such, ma. A steephead valley steephead or blind valley is a deep narrow flat bottomed valley with an abrupt ending Such closed valleys may arise in limestone or karst landscapes where a layer of permeable rock lies above an impermeable substract such as marl Water flowing through a steephead valley leaves via one or more ponors 1 or sinkholes The Reculee de Baume Blind valleys are typically dry at their lower ends 2 If the ponor cannot contain the high runoff during a flood event an intermittent flow may continue through the valley beyond the sink Such a landform is called a semi blind or half blind valley 3 Contents 1 Development 2 Examples 3 See also 4 ReferencesDevelopment EditThey are created by a stream flowing within the permeable rock and eroding it from within until the rock above collapses opening up a steep narrow valley which is then further eroded by the stream running across the impermeable valley floor citation needed At the head of the valley the stream emerges from the rock as a spring Notable examples can be found in the Jura region of France for example the Reculee de Baume at Baume les Messieurs and the Reculee d Arbois with its head at Les Planches pres Arbois and its exit at Arbois In North America blind valleys the preferred American term are found in the Driftless Area and other karst regions Examples EditTasghimut Gara MedouarSee also Edit Earth sciences portalBox canyonReferences Edit Gutierrez Francisco Mateo Gutierrez 2016 Landforms of the Earth An Illustrated Guide Springer p 68 ISBN 9783319269474 Retrieved 26 November 2016 Heggen Richard 2015 Underground Rivers From the River Styx to the Rio San Buenaventura with occasional diversions Richard Heggen p 647 Retrieved 26 November 2016 Huggett Richard J 2003 Fundamentals of Geomorphology Psychology Press p 152 ISBN 0415241464 Retrieved 26 November 2016 This article related to topography is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Steephead valley amp oldid 1098977177, wikipedia, wiki, book, books, library,
