Which consequence occurs when hydrostatic pressure builds behind extensive pietra dura inlay within a Mughal garden water feature?

💡 Explanation

Localized efflorescence occurs when water seeps behind the non-porous pietra dura due to hydrostatic pressure; mineral salts then dissolve and are precipitated on the surface as water evaporates. This outcome is because of osmosis pushing water through small cracks, rather than biofilm or even expansion.

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