Читать книгу Monument Future - Siegfried Siegesmund - Страница 41

Carbonate stone with spongy appearance. Colour: creamy-white or yellowish; Mineral: calcite. Decay morphologies: roughening, sulphate skin formation, soot deposits in the cavities. Geology: carbonate deposition from hot springs (Upper Pleistocene). Quarry: near Serre di Rapolano, east of Sienna (Tuscany). Use: the stone was taken in great consideration during the Thirties as blocks and thick slabs with sawed face for cladding (Main Atrium of the Stazione Centrale; Ca’ Brütta, lower part of façades, G. Muzio 1922; Palazzo della Borsa, colonnaded façade, P. Mezzanotte 1932, Milan). This stone is very similar to Travertino romano (Lapis Tiburtinus, coming from Tivoli-Guidonia, Rome), largely used in ancient Rome and by Baroque architects, later (since the third decade of 20th century) spread in the whole Italian territory.