found elsewhere....Karst Landforms Allogenic Valleys Torn Gorge in the Grand Caucasses area of...
Transcript of found elsewhere....Karst Landforms Allogenic Valleys Torn Gorge in the Grand Caucasses area of...
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Karst Processes
Karst are defined as terrain with distinctive characteristics of relief and drainage arising primarily from a higher degree of rock solubility in natural water than is found elsewhere.
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Karst Processes
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Karst Processes
Karstlands
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Karst Processes
Resisting Framework
Lithology - Limestones show great variability due to their definition.
• A limestone is a rock containing at least 50% carbonate mineral,
• The two most common carbonate minerals in limestone are a low magnesium (1-4%) calcite and dolomite.
• The purer the limestone is with respect to calcite, the greater tendency to form karst.
• Dolomites and evaporites such as gypsum and halite are also prone to karstification.
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Karst Processes
Resisting Framework
Porosity and Permeability
P = ( VV / V ) X 100
where P is porosity, Vv is volume of voids, and V is total volume of material.
Two types of porosity:
• Primary porosity
• Secondary porosity
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Karst Processes
Resisting Framework
Secondary Porosity
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Karst Processes
Resisting Framework
Secondary Porosity
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Karst Processes
Driving Mechanics and Controls
Climate, Vegetation, and Biogenic CO2
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Karst Processes
Driving Mechanics and Controls
The Solution Process
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Karst Processes
Driving Mechanics and Controls
The Solution Process
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Karst Processes
Driving Mechanics and Controls
The Solution Process
S = C * Q
Where:S is solution, C is the solute
concentration and Q is stream discharge.
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Karst Processes
Karst Hydrology and Drainage Characteristics
Surface Flow - Rivers lose water when some of the flow descends into swallow holes or swallets.
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Karst Processes
Karst Hydrology and Drainage Characteristics
Karst Aquifers and Groundwater
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Karst Processes
Karst Hydrology and Drainage Characteristics
Karst Aquifers and Groundwater
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Karst Processes
Karst Hydrology and Drainage Characteristics
Surface and Groundwater Connection
• Shafts
• Springs
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Karst Processes
Karst Landforms
Closed Depressions - Dolines
• Solutional
• Collapse
• Subsidence
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Karst Processes
Karst Landforms
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Karst Processes
Karst Landforms
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Karst Processes
Karst Landforms
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Karst Processes
Karst Landforms
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Karst Processes
Karst Landforms
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Karst Processes
Karst Landforms
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Karst Processes
Karst Landforms
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Karst Processes
Karst Landforms
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Karst Processes
Karst Landforms
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Karst Processes
Karst Landforms
Allogenic Valleys
Torn Gorge in the Grand Caucassesarea of France.
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Karst Processes
Karst Landforms
Blind and Dry Valleys
Pocket Valleys
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Karst Processes
Tropical Karst.
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Karst Processes
Limestone Caves
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Karst Processes
Limestone Caves
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Karst Processes
Limestone Caves
Entrances and terminations
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Karst Processes
Limestone Caves
Passages, Rooms, and Patterns
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Karst Processes
Origins of Limestone Caves
caves form:
• above the water table by corrosive action of vadose water,
• beneath the water table by circulation of phreatic water, or
• at the water table or in the shallow phreaticzone, often associated with fluctuations of the water table itself.