History, 06.10.2019 04:30 clairesmom
Karst topography is any region where the terrain has been dissolved by the action of water. these areas are composed of carbonate rocks, such as dolomite and limestone, or have a high concentration of evaporites, such as salt and gypsum. when slightly acidic rainwater falls to earth and becomes the groundwater that flows over limestone, we see the karst topography illustrated form. explain how this happens.
a) karst topography can be the result of physical weathering when groundwater causes limestone bedrock to dissolve in the acidic solution to create carbon dioxide and water from the carbonate rocks.
b) karst topography results when slightly acid groundwater chemically weathers the limestone. the acidic water reacts with the calcium carbonate in the limestone creating calcium salt, water and carbon dioxide.
c) karst topography is the result of erosion. acidic groundwater, moving through bedrock, dissolves away the rocks particles. the result is the cracking and breaking of the bedrock forming caves and sinkholes.
d) karst topography occurs when groundwater causes the limestone to dissolve physically, similar to the way we make a solution of salt and water. the limestone particles get smaller and smaller until the bedrock crumbles.
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