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Types of Weathering Kim Bennison Katy Hogan Alex Gage Kelly Fischer

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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.


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