Karst Topography
Karst Topography
A form of landform denudation based almost
exclusively on carbonation (chemical
weathering)
  Chemical we...
Features of Karst landscapes
  Sinkholes
  Caves and Caverns
  Poor surface drainage
    Disappearing surface streams
    ...
Sinkholes
  Depressions in the
  landscape
  Formed by water
  draining through a
  joint
  Doline: A sinkhole
  that inte...
Caves and Caverns
 Caverns typically form near the water
 table, such that fluctuations in the level of
 the water table a...
Stalactite

               Column


  Stalagmite
Karst Topography
Karst Topography
Karst Topography
Karst Topography
Karst Topography
Karst Topography
Karst Topography
Karst Topography
Karst Topography
Karst Topography
Karst Topography
Karst Topography
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Karst Topography

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Karst Topography

  1. 1. Karst Topography
  2. 2. Karst Topography A form of landform denudation based almost exclusively on carbonation (chemical weathering) Chemical weathering of joints and fractures can create huge subsurface cavities Requirements for formation [Note connection to hydrologic cycle] Water Limestone must be at least 80% calcium carbonate (CaCO3) Limestone must have a complex network of joints for water to pass through A zone of aeration (allows for water to flow) Vegetation cover providing different acids
  3. 3. Features of Karst landscapes Sinkholes Caves and Caverns Poor surface drainage Disappearing surface streams Underground rivers
  4. 4. Sinkholes Depressions in the landscape Formed by water draining through a joint Doline: A sinkhole that intersects the water table, forming a small lake Collapse Sinkhole: sinkhole breaks through roof of Devil’s Sinkhole underlying cavern
  5. 5. Caves and Caverns Caverns typically form near the water table, such that fluctuations in the level of the water table alternately inundate and drain them Phreatic zone Lowering of the water table (or uplift) later keeps them drained Dripstone: stalactites, stalagmites, columns
  6. 6. Stalactite Column Stalagmite
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