Karst Landscapes - Irish Karst (Leaving Cert Geography): Flashcards
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Definition of karst
Definition of karst
Area of exposed limestone shaped by chemical weathering (carbonation)
Main process shaping karst landscapes
Main process shaping karst landscapes
Carbonation
3 reasons limestone is permeable
3 reasons limestone is permeable
Porous, pervious, dissolves in carbonic acid
Two main Irish karst regions
Two main Irish karst regions
Burren (Co. Clare), Marble Arch (Co. Fermanagh)
Glacio-karst meaning
Glacio-karst meaning
Limestone landscapes affected by glaciation
Limestone pavement features
Limestone pavement features
Flat exposed limestone blocks separated by deep intersecting joints
Clints in karst
Clints in karst
Limestone blocks divided by grikes
Grikes in karst
Grikes in karst
Intersecting lines formed in limestone from carbonation
Percolation definition
Percolation definition
Movement of water through pores and holes in rock
Karrens in limestone pavement
Karrens in limestone pavement
Small hollows on clints formed by carbonation
Swallow hole definition
Swallow hole definition
Narrow funnel-shaped hole where river disappears underground
Alternative name for swallow holes
Alternative name for swallow holes
Sluggas
Dry valleys in karst
Dry valleys in karst
Left when rivers disappear through swallow holes
Point of resurgence
Point of resurgence
Where river reappears after flowing underground
Where swallow holes commonly form
Where swallow holes commonly form
Where limestone borders impermeable rock (e.g. shale)