Which problem spurred the use of clay cones in Mesopotamian mud-brick construction of ziggurats?

💡 Explanation

When annual flooding occurred in the Tigris and Euphrates area, significant water permeated the mud-brick which was weakened during freeze-thaw cycles as water expanded when freezing. Therefore, increased water permeation occurred during flooding conditions, rather than structural instability, thermal stress, or high salt content which would require specific geo hazards and composition, respectively.

• Which astronomical effect complicates measuring star positions using a medieval astrolabe at different locations?
• Which limitation constrained early medieval glass lenses for magnification in astrolabes?
• Which mechanism limited maximum stone span achievable in Roman arch construction before concrete?
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• Which outcome accelerated soil depletion on Andean agricultural terraces following the Spanish conquest?
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