Travertine, Pamukkale

The town got its name from the Pamukkale travertine, which have developed over millennia by calcareous hot springs and are a tourist attraction today. The terraces are on the list of world cultural heritage by UNESCO.

The local spring water is saturated with calcium bicarbonate. Upon exiting carbon dioxide escapes through the pressure drop, so that the solubility of calcium carbonate is exceeded, which precipitates in the form of travertine. 250 liters thermal water (30 ° C) are distributed per second, ie 21,600 m³ per day. In one liter of 2.2 g of lime is dissolved, is excreted in part, the daily amount that could reach up to 48 tons, it is actually significantly less.

This natural phenomenon leaves white layers on the stone, which gives the appearance of a mountain fortress of cotton or a frozen waterfall. As similar examples include the Mammoth Hot Springs Yellowstone National Park, Egerszalók Hungary, the Pink and White Terraces – destroyed by a volcanic eruption in 1886 – New Zealand or Huanglong in China.

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