"It took millions of years to form" Not particularly. Travertine and dolomite limestone are hydrothermal depositions. They form quite rapidly, and in some loca

"It took millions of years to form" Not particularly. Travertine and dolomite limestone are hydrothermal depositions. They form quite rapidly, and in some locations you can watch it being formed to this day, like in some areas of Yellowstone (where the travertine is only a few thousand years old at best.) Dolomite is a little slower than Travertine to grow, but what we now understand about its formation also means it was very likely to have been rapidly-formed by simple geologic acid washes over shorter periods of time than we initially thought - read https://www.forbes.com/sites/davidbressan/2023/11/27/scientists-solve-200-year-old-dolomite-problem/?sh=4184018d43a5 https://www.forbes.com/sites/davidbressan/2023/11/27/scienti... and you'll catch on to what I'm saying.