Microsoft Rewards Bing Homepage Quiz: The natural dams that separate the park’s lakes are made of a porous stone called…
A Shale
B Travertine
C Granite
The 16 lakes are separated by natural formations of travertine, created by the interplay of water, plant material and bacteria. The travertine barriers in Plitvice grow at a rate of about 1cm a year.
The correct answer is Travertine.