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 Smithsonian: Building Up, Breaking Down
This close-up view of the base of a marker shows flaking and chipping caused by physical weathering. 10 This sandstone tablet is disappearing because of chemical weathering.The mineral calcite, which holds the quartz sand grains together, dissolves away. The loosened sand accumulates a...
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This close-up view of the base of a marker shows flaking and chipping caused by physical weathering. 10 This sandstone tablet is disappearing because of chemical weathering.The mineral calcite, which holds the quartz sand grains together, dissolves away. The loosened sand accumulates at the marker’s base. If acidic precipitation continues to damage the stone, only a pile of loose red sand will remain. Leanne Wiberg Leanne Wiberg
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http://www.smithsonianeducation.org/educators/lesson_plans/building.pdf#page=10
www.smithsonianeducation.org/educators/lesson_plans/building.pdf#page=10
This close-up view of the base of a marker shows flaking and chipping caused by physical weathering. 10 This sandstone tablet is disappearing because of chemical weathering.The mineral calcite, which holds the quartz <span class="highlight">sand</span> grains together, dissolves away. The loosened <span class="highlight">sand</span> accumulates at the marker’s base. If acidic precipitation continues to damage the stone, only a pile of loose red <span class="highlight">sand</span> will remain. Leanne Wiberg Leanne Wiberg
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