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To break something so that it does not separate, but very thin lines appear on its surface. Cracking may be due to weathering, flaws in the stone, static problems, rusting dowels, too hard repointing mortar. Vibrations caused by earth tremors, fire, frost may also induce cracking.
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The crack pattern in the consoli palace cross hall is observed through GPR measurements and a combined measurement of temperature and crack width.