Physical Geography

  • No categories

Entries - Entry Category: Physical Geography - Starting with K

Karst Topography

Karst topography refers to natural features produced on a land surface due to the chemical weathering or slow dissolving of limestone, dolostone, marble, or evaporite deposits such as halite and gypsum. The chemical weathering agent is slightly acidic groundwater that begins as rainwater. Rainwater becomes acidic by absorbing carbon dioxide to create carbonic acid as it falls through the atmosphere. It then passes through the soil horizon and, now acidic groundwater, moves through fractures (cracks) and open spaces within rocks. Solution occurs as carbonic acid in groundwater dissolves calcite, which is the principal mineral in limestone and marble and an important mineral in dolostone. Halite and gypsum are easily dissolved in water alone. The region in Arkansas most well known …

Kings River

The Kings River runs for about ninety miles through Madison and Carroll counties to its confluence with the White River arm of Table Rock Lake, located on the Missouri–Arkansas border. As with other rivers that begin on the north-facing slopes of the Boston Mountains, the Kings River flows north. The river divides Carroll County politically; in 1883, the Arkansas legislature recognized two judicial districts, at Berryville (Carroll County) and Eureka Springs (Carroll County), on opposite sides of the river, though the river itself was not the legal boundary until 2011. The Kings River drains from two very different subsections of the Ozarks. Its headwaters form in the oak forests of the Boston Mountains sub-region of the Ozark Plateau near the …