![Travertine-structures-are-formed-in-water-with-high-concentrations-of-dissolved-calcium-bicarbonate-Krka-River,-Croatia](https://videocdn.cdnpk.net/excite/content/video/premium/partners0504/thumbnails/BB_a2b98cea-b806-4ab5-8b5b-25fd606f70d8_small.jpg)
Travertine structures are formed in water with high concentrations of dissolved calcium bicarbonate Krka River, Croatia
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