"The southern Adria microplate is covered by a thick layer of buoyant rocks called carbonates," said lead researcher Richard A. Bennett of the University of Arizona in Tucson.
Carbonates get piled up on the seafloor in front of the moving plate, forming new islands. Over millions of years the islands are squeezed together like folds in an accordion, which creates new additions to the nearby Dinaric Alps.
What's more, the fault is causing the southern "boot heel" of Italy to move toward the Croatian coast at a rate of about 0.16 inch (0.4 centimeter) a year, while the Adriatic seafloor is sliding under Croatia.
The new fault spans at least 124 miles (200 kilometers) along the seafloor northwest of Dubrovnik in southern Croatia
It runs under the Dalmatians, which consist of 1,185 islands off Croatia's coast that have become a popular tourist destination..

Somebody should do something about this before it's too late.