トラバーチン
Discipulo, M.K. 2000. Depositional facies and aqueous-solid geochemistry of travertine-depositing hot springs (Angel Terrace, Mammoth Hot Springs, Yellowstone National Park, U.S.A.). Journal of Sedimentary Research 70, pp. 565-585.
↑ "How Does Water Turn to Stone" Nature, Land Of The Falling Lakes, Pbs
↑ Folk, R. L., et al.; (1985) Bizarre forms of depositional and diagenetic calcite in hot spring travertines, in Carbonate Cements; SEPM Special Pub. 36.
↑ 地質調査所月報, vol.50, no.2, 1999. 工業技術院地質調査所
↑ 琉球トラバーチン(コトバンク)
↑ 川崎と沖縄:石敢當(いしがんとう)物語
↑ The Getty Center http://www.getty.edu/visit/see_do/architecture.html
↑ The Willis Tower http://www.willistower.com/interior_exterior.html