rocks and landscapes
Post on 26-Feb-2016
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Rocks and LandscapesChapter 7
Limestone features
The Burren, Co. Clare
KarstThe word Karst means exposed or bare ground. It is used mainly to describe a Limestone area where this karstic landscape can be seen.
Characteristics of Karst regions• Lack of rivers• Swallow holes on the surface• Dolines• Underground water
Why are limestone areas…karst areas?
Because limestone is……..•Permeable•Well jointed•Has bedding planes•Chemically weathered by………..carbonation
Carbonation of Limestone
If you go down to a karst area today……
Limestone features
Overground features:• Limestone pavement with
clints, grikes and karren• Terraces• Swallow holes• Dolines / Sinkholes• Turloughs
Limestone Pavement
clints
Grikes
Karren
Terrace
Limestone features
Underground features:• Caves and passages• Stalactites• Stalagmites• Pillars• Curtains• Streams
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