Читать книгу Monument Future - Siegfried Siegesmund - Страница 37

Organic carbonate rock (limestone, biosparite-wackestone) with different varieties according to the texture (Fiorito, Granitello). Colour: grey with evidence of shells of Bivalves (Rudistae). Mineral: calcite. Decay morphologies: surface erosion, sulphate skin formation. Geology: “Calcare di Aurisina” formation (upper Creta-ceous) of the Karst of Trieste. Quarry: near Aurisina (Nabrežina) in the north-western part of Karst (Trieste province). Use: early uses are documented in Roman architecture of north-eastern Italy and also in Milan (funerary stelae and blocks of urban walls); nevertheless the stone was used in the 20th century as blocks with point chiseled face (main body of Stazione Centrale, U. Stacchini 1912/31, Milan; former Banca Commerciale now Ragioneria Comunale, L. Beltrami 1913/23, Milan).

Other sedimentary rocks coming from Karst, with similar origin (organic limestone) and composition, were employed in 20th century architecture for flooring and cladding: Gabria Tomadio, Lipos, Repen.