Chapt 17-Solution Processes and Karst Topography

Chapt 17-Solution Processes and Karst Topography - Chapter...

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Chapter 17: Solution Processes and Karst Topography I. The Impact of Solution Processes on the Landscape A. through mechanical action underground water has limited influence on topographic development, but its chemical action is very effective B. water is a solvent for certain rock-forming chemicals, dissolving them from rock, carrying them away in solution and depositing them elsewhere II. Solution and Precipitation A. dissolution 1. underground water’s composition (a weak solution of carbonic acid) makes it an effective solvent 2. dissolution is an important weathering-erosion process for all rocks a. particularly effective on carbonate sedimentary rocks, especially limestone b. other rocks that dissolve readily: gypsum; chalk; and, dolomite 3. when great volumes of rock are dissolved and removed, conspicuous voids are left in the bedrock 4. factors that increase carbonic acid action: a. humid climate b. profusion of joints and bedding planes – allows water to penetrate c. water movement/deep surface stream – continual supply of fresh unsaturated water allows dissolution of more rocks d. cool water – cool water is a better solvent of calcium carbonate than hot water 5. limestone’s ready solubility contrasts notably with its mechanical durability B. precipitation 1. minerals precipitate out of solution in caverns 2. hot springs and geysers a. underground water in contact with magma becomes heated b. when hot water reaches the surface, it cools and its mineral contents precipitates out of solution c. deposits form mounds, terraces, walls, and rims
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This note was uploaded on 11/19/2008 for the course CJC 101 taught by Professor Brown during the Spring '07 term at Ball State.

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Chapt 17-Solution Processes and Karst Topography - Chapter...

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