The Baccu Locci river incises Paleozoic schist with lead-arsenic sulfide ore that has been mined for centuries. The bottom of one of its tributary valleys shows a lake that is situated near the former mine ore processing plant.
Sardinia is the second-largest island in the Mediterranean Sea (after Sicily). The area of Sardinia is 24,090 square kilometres (9,301 sq mi). The island is surrounded (clockwise from north) by the French island of Corsica, the Italian Peninsula, Tunisia and the Balearic Islands. Sardinia is a constitutional part of Italy, with a special statute of regional autonomy under the Italian Constitution. http://en.wikipedia.org/wiki/Sardinia