how does dissolution of limestone relate to karst topography?

Answer 1

Water dissolves limestone under the surface which causes the top layer to collapse, which forms sinkholes & that is what is known as karst topography.

Answer 2

Living in the Limestone Belt of Southern Indiana, we have Karst topography everywhere!

Limestone is essentially calcium carbonate (there are other carbonate minerals), which dissolves when exposed to acids. Rainfall is naturally slightly acidic, and dissolves the limestone - which is where the typical rounded shape of the land comes from. It is how sinkholes, caves, etc. form.

Try these for further information:
http://geography.about.com/od/physicalgeography/a/karst.htm
http://www.watersheds.org/earth/karst.htm
http://igs.indiana.edu/geology/karst/karstInIndiana/index.cfm

Answer 3

Karst Topography is the equipment of underground caves and sinkholes in a (somewhat) flat limestone terrain. Carbonic acid (H2CO2) etches out limestone alongside fractures interior the limestone, interior the technique arising this topography.

Answer 4

Karst Topography is the system of underground caves and sinkholes in a (relatively) flat limestone terrain. Carbonic acid (H2CO2) etches out limestone along fractures in the limestone, in the process creating this topography.