Peperino
Esquema
Jerarquía
<materials by composition> > inorganic material > rock > igneous rock > <igneous rock by origin> > extrusive rock > pyroclastic rock > tuff
Descripción
Ash, gravel, and volcanic material that have been closely welded together to form a rock that is characteristically dark greenish gray and studded with black fragments that resemble peppercorns, hence its name. It is used for stairs and fountain bases because it becomes more consistent when wet. Susceptible to heat and frost, it is only found in great condition underground. Quarries for this rock are found near Albano and the Castle of Marino in Italy.
Subcategorías
URI original del concepto
Otros términos
- 白榴凝灰岩 [zh]
- bái liú níng huī yán [zh]
- bai liu ning hui yan [zh]
- pai liu ning hui yan [zh]
- lapis albanus [en]
- 白榴擬灰岩 [zh]
- 碎晶凝灰岩 [zh]