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DIFFERENT TYPES OF WEATHERING
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Types of WeatheringKim BennisonKaty HoganAlex GageKelly Fischer
Mechanical/Physical WeatheringExfoliationIce WedgingOrganic WedgingAbrasion
ExfoliationWhen a rock has heat exerted upon it, along with pressure, it separates into layers.
Ice WedgingWhen water leaks into the cracks of rocks, it freezes and causes the rock to crack.
Organic ActivityThis occurs when burrowing animals, humans, or plants interfere and work their way into rocks.
AbrasionAbrasion occurs when rocks rub against eachother and become rounded.
Chemical WeatheringHydrolysisOxidationDissolutionAcid CarbonationPrecipitationPlant Acid
Hydrolysis When rocks sit in water for extended periods of time they begin to break down and have a clay-like texture.
Oxidation When oxygen reacts with iron in rocks, they rust, taking on a red-orange color.
Dissolution Rocks, when in water, react with acids in the water and dissolve. A clue that this has happened to a rock is the presence of small holes.
Acid 1Carbonation- water absorbs carbon dioxide when rain falls or from decaying organic material. The carbon dioxide dissolved in water forms carbonic acid that reacts with many common minerals.
Acid 2Precipitation- Water in the atmosphere absorbs sulfur oxides and nitrogen oxides. Through a series of chemical reactions these pollutants are converted into acids that are a cause of acid precipitation.
Acid 3Plant Acid- When plants decay they release acids that react with the minerals in rocks.