石材分類=大理石, 写真横約=15cm
ポルトロ
Portoro岩石名：石灰岩 limestone
産地：イタリア・リグーリア県
地質時代：中生代三畳紀
絶対年代：200 Ma
地質体：ラスペーチア層
black micritic limestone from La Spezia Formation (Rhaetian Stage, upper Upper Triassic, ~200-204 Ma).
利用例：名古屋市美術館、赤坂プリンスクラシックハウス(旧李王家東京邸)
Reference;
Giuliani, A., et al. (2010) Portoro marble and quarry activities in the gulf of La Spezia (N. Italy): Giacimentological framework and historical exploitation techniques. Geoingegneria Ambientale e Mineraria 131, 29-38.
Fratini、F., et al. 2015, Portoro, the black and gold Italian "marble". Rend. Fis. Acc. Lincei, 26, 415–423. DOI 10.1007/s12210-015-0420-7
Giuliani, A., et al. (2010) Portoro marble and quarry activities in the gulf of La Spezia (N. Italy): Giacimentological framework and historical exploitation techniques. Geoingegneria Ambientale e Mineraria 131, 29-38.
Fratini、F., et al. 2015, Portoro, the black and gold Italian "marble". Rend. Fis. Acc. Lincei, 26, 415–423. DOI 10.1007/s12210-015-0420-7