Travertine terraces thicken as mineral springs drop calcium carbonate
Travertine terraces grow where mineral springs lose carbon dioxide and deposit calcium carbonate in rimstone dams, shelves, and cascading white or cream steps.
Microbes and mosses can speed or shape the crusts, while water temperature and flow rate control how fast new stone appears. Sites from Italy to China share the same slow architecture.
A spring can masonry a hillside. Travertine terraces prove mineral water is a builder that works without scaffolding or schedules.
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