Читать книгу Monument Future - Siegfried Siegesmund - Страница 46

Regional metamorphic rock (marble, medium to fine grain-size). Colour: white with bands of various colours (grey to black due to graphite; green to chlorite; pink to zoisite); sometimes groups of little elongate black spots with shaded rims are present and an appropriate cut may produce a particular graphic effect (called Fantastico). Minerals: calcite; graphite, chlorite and zoisite. Decay morphologies: surface erosion, sulphate skin formation. Geology: Laas Unit (micaschist, banded paragneiss and marble) of Ortles-Campo Nappe, Austro-Alpine System (Pre-Permian metamorphic Basement). Quarry: above the village of Lasa-Laas (val Venosta-Vinschgau, Bolzano-Bozen province), the most important one (Weisswasser) was located at an altitude of 1,600 metres and the marble came down the hill using a incline railway. Use: mainly polished slabs for cladding; in some cases, the slabs are disposed in “open book style” (Casa Rustici, G. Terragni 1935, Milan; Torre Rasini, E. Lancia and G. Ponti 1934, Milan).