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Karst Processes and Landforms

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Presentation transcript:

Subsidence sinking of ground surface (vertical deformation) Rates can vary (collapse to gradual) Caused by removal of subsurface fluids (oil, ground water, steam, gas) or solids (limestone dissolution, coal, salt)

Karst Typical karst topography developed on carbonate bedrock in Russell County, VA Valley & Ridge province. From Lebanon 7.5' topographic map.

Ground water “mining”

subsidence from mining subsurface coal

Lake Peigneur, LA – salt mine collapse History Channel footage

recognizing subsidence at your site