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Hypertufa is an anthropic rock made from various aggregates bonded together using Portland cement. Hypertufa is intended as a manufactured substitute for natural tufa , which is a slowly precipitated limestone rock; being very porous , it is favorable for plant growth.
Tufa is a variety of limestone formed when carbonate minerals precipitate out of water in unheated rivers or lakes. Geothermally heated hot springs sometimes produce similar (but less porous) carbonate deposits, which are known as travertine or thermogene travertine .
Tuff is often erroneously called tufa in guidebooks and in television programs but tufa is a form ... Peperino has been used in Rome and Naples as a building stone, ...
There are two common forms of flowstones, tufa and travertine. Tufa is usually formed via the precipitation of calcium carbonate, and is spongy or porous in nature. Travertine is a calcium carbonate deposit often formed in creeks or rivers; its nature is laminated, and it includes such structures as stalagmites and stalactites.
Cotswold stone – oolitic limestone used for building and roofing in the Cotswolds; Dent Marble (not a "true marble"; Crinoidal limestone) Frosterley Marble – northern England (not a "true marble") Hamstone – Building stone from Somerset; Headington stone – A limestone from Oxford; Hopton Wood stone – Type of limestone
The tufa stone core of this altar is housed inside the church of Santa Maria in Cosmedin. The Forum Boarium was the site of the first gladiatorial contest at Rome which took place in 264 BC as part of aristocratic funerary ritual—a munus or funeral gift for the dead.
The first stone cathedral, was begun by Bishop Thur in 1110 and stood completed in 1134. Tufa stone was imported from Germany to build the permanent structure, as stone was a scarce resource around Ribe. The cathedral was built in the Romanesque style, with half-rounded arches supporting a flat timber ceiling, a typical basilica style building ...
Lastly, each of the tufa three beds, from bottom to top, progresses from a spongy texture to a dense crystalline cap. Each tufa bed is also overlain by either a thin clay layer or paleosol. Alongside a heavy oxygen isotope signature in the paleosols that suggests high evaporation, this change in texture indicates cyclical changes in water level.