Information about Dry Valley
A dry valley is a valley found in either Karst (limestone) or chalk terrain that no longer has a surface flow of water. There are many examples of the latter along the North and South Downs in southern England. Examples include the Alkham Valley near Dover, and the Hartley Bottom and Fawkham valleys near Dartford in north Kent.details
There are two theories as to how they were made, the first that the water table was once much higher, while the other is that during the ice age the area had tundra like conditions. The normally permeable chalk would have been made impervious by permafrost, thus allowing rivers to flow.
During the ice age the water was not able to flow through the limestone because it was frozen. But when the ice melted, the water on the surface of the land carved wide valleys. Today these valleys don't have any rivers because it sinks through into the limestone and flows underground in caverns. Hence why they are called 'Dry Valleys'
There are many examples in the Peak District. A notable example is the valley of the River Manifold which is dry, except in spate, from Wetton south for several miles. |240px|Dover (
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There are two theories as to how they were made, the first that the water table was once much higher, while the other is that during the ice age the area had tundra like conditions. The normally permeable chalk would have been made impervious by permafrost, thus allowing rivers to flow.
During the ice age the water was not able to flow through the limestone because it was frozen. But when the ice melted, the water on the surface of the land carved wide valleys. Today these valleys don't have any rivers because it sinks through into the limestone and flows underground in caverns. Hence why they are called 'Dry Valleys'
There are many examples in the Peak District. A notable example is the valley of the River Manifold which is dry, except in spate, from Wetton south for several miles.
See also
McMurdo Dry Valleys Karst topography is a landscape shaped by the dissolution of a soluble layer or layers of bedrock, usually carbonate rock such as limestone or dolomite. These landscapes display distinctive surface features and underground drainages, and in some examples there may be little or no
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Limestone is a sedimentary rock composed largely of the mineral calcite (calcium carbonate: CaCO3). Limestone often contains variable amounts of silica in the form of chert or flint, as well as varying amounts of clay, silt and sand as disseminations, nodules, or layers
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Chalk (IPA: /ˈtʃɔːk/) is a soft, white, porous sedimentary rock, a form of limestone composed of the mineral calcite.
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North Downs are a ridge of chalk hills located in south east England that stretch for 120 miles (190 km) from Hampshire through Surrey to Kent. They form the northern part of the Wealden dome, of which the South Downs are their mirror image and often reach in excess of 200 metres
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South Downs
Area of Outstanding Natural Beauty
Country England
Counties East Sussex West Sussex Hampshire
Location | south-east England
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Area of Outstanding Natural Beauty
Near Beachy Head
Country England
Counties East Sussex West Sussex Hampshire
Location | south-east England
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Motto
Dieu et mon droit (French)
"God and my right"
Anthem
No official anthem specific to England — the anthem of the United Kingdom is "God Save the Queen".
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Dieu et mon droit (French)
"God and my right"
Anthem
No official anthem specific to England — the anthem of the United Kingdom is "God Save the Queen".
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The Alkham Valley is in the Kent Downs (the eastern part of the North Downs), an Area of Outstanding Natural Beauty, in South East Kent, England. The valley, a lies between Folkestone and Dover.
The Valley is a Dry valley, typical of many others on the chalk downs.
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The Valley is a Dry valley, typical of many others on the chalk downs.
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Dover
Aerial view of Dover harbour
Aerial view of Dover harbour
Dover ()
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Dartford
Dartford ()
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In physical geography, tundra is an area where the tree growth is hindered by low temperatures and short growing seasons. The term "tundra" comes from Kildin Sami tūndâr 'uplands, tundra, treeless mountain tract'.
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Peak District
National Park of England
Protected Landscape/Seascape (IUCN V)
Country England
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National Park of England
Protected Landscape/Seascape (IUCN V)
Peak District entrance stone on Hathersage Road, Sheffield
Country England
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River Manifold is a river in Staffordshire, England. It is a tributary of the River Dove (which also flows through the Peak District forming the boundary between Derbyshire and Staffordshire).
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Wetton is a small village in the Staffordshire Peak District. It is located about 2 miles west of Alstonfield and 8½ miles east of Leek. It stands high above the Manifold Valley and contains mostly ston-built proprties.
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The McMurdo Dry Valleys are a row of valleys in Antarctica located within Victoria Land west of McMurdo Sound. The region includes many interesting geological features including Lake Vida and the Onyx River, Antarctica's longest river.
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