Marés is the local term used in the Balearic Islands for a sandstone made up of calcareous grains held together by a natural carbonate cement. It is formed by the lithification of the dunes. In the 19th century, the inhabitants of Menorca began to extract marés from a quarry near Ciutadella. The extraction was carried out throughout the 20th century. Finally, the activity in the quarry ceased in 1994. Spanish law required the stonecutters to fill in the area (more than seven hectares) and reforest it. Garbage and waste of…
