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How does granite’s resistance to exfoliation compare?
Granite is renowned for its exceptional durability and resistance to exfoliation, a form of weathering where rock layers peel away due to environmental stress. Compared to sedimentary rocks like sandstone or shale, granite exhibits far greater resistance to exfoliation because of its dense, interlocking crystalline structure and low porosity. This makes it less susceptible to water infiltration and freeze-thaw cycles, which are primary drivers of exfoliation.
The mineral composition of granite, primarily quartz and feldspar, contributes to its hardness and chemical stability. Unlike softer rocks, granite withstands mechanical and chemical weathering more effectively, retaining its structural integrity over centuries. However, in extreme climates or under prolonged exposure, minor exfoliation can occur, particularly along natural fractures or joints.
In summary, granite outperforms most other common rocks in exfoliation resistance, making it a preferred choice for construction and monuments. Its longevity is a testament to its geological resilience.
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