GEO 110 Chapter Notes - Chapter 6: Karst, Weathering, Stalagmite
25 Jul 2016
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Mechanical weathering: there is no change in the chemical composition in rocks, rather they break down. There are several examples: pressure-release fracturing : when granite rocks are formed deeper in the earth they are exposed after years of erosion. Once erosion takes place the pressure is released and rocks expand and break down into smaller fragment ex. John"s shut ins state park: frost wedging: when ice crystals accumulate in cavities at night, during the day the ice melts, and the rocks contract. Freezing at night and thawing during the day ex. Along the atlantic coast of canada ,new brunswick: abrasion by rocks: process of collision between lose sediments transported through wind, and stable rocks on the surface of the land. Night time less than 5 and day time 25 degrees. 30 degrees change in temperature: salt crystal growth: when water that is accumulated within rocks, the salt turns into crystals.
