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| a rigid, relatively slender, upright support, composed of relatively few pieces |
| a fa?ade, or a part or feature of a fa?ade, often highlighted by ornamentation |
weathering (wě 'ər-ĭng) Pronunciation Key
Any of the chemical or mechanical processes by which rocks exposed to the weather undergo chemical decomposition and physical disintegration. Although weathering usually occurs at the Earth's surface, it can also occur at significant depths, for example through the percolation of groundwater through fractures in bedrock. It usually results in changes in the color, texture, composition, or hardness of the affected rocks. |
The process by which rocks are broken down into small grains and soil. Weathering can happen through rainfall, ice formation, or the action of living things, such as algae and plant roots. It is part of the geological cycle.