Tuff

Tuff (from the Italian tufo) is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Following ejection and deposition, the ash is compacted into a solid rock in a process called consolidation. Tuff is sometimes called tufa, particularly when used as construction material, although tufa also refers to a quite different rock. Rock that contains greater than 50% tuff is considered tuffaceous.

Tuff is a relatively soft rock, so it has been used for construction since ancient times. Since it is common in Italy the Romans used it often for construction. The Rapa Nui people used it to make most of the moai statues in Easter Island.

Tuff can be classified as either sedimentary or igneous rocks. They are usually studied in the context of igneous petrology, although they are sometimes described using sedimentological terms.

Volcanic ash

The material that is expelled in a volcanic eruption can be classified into three types:

Tuffé

Tuffé is a commune in the Sarthe department in the region of Pays-de-la-Loire in north-western France.

See also

References

Tuff (name)

Tuff is both a given name and a surname. Notable people with the name include:

Punk subculture

The punk subculture, which centres on punk rock music, includes a diverse array of ideologies, fashions and forms of expression, including visual art, dance, literature and film. The subculture is largely characterized by anti-establishment views and the promotion of individual freedom. The punk subculture is centered on a loud, aggressive genre of rock music called punk rock. It is usually played by small bands consisting of a vocalist, one or two electric guitarists, an electric bassist, and a drummer.

Although punks are frequently categorised as having left-wing or progressive views, punk politics cover the entire political spectrum. Punk-related ideologies are mostly concerned with individual freedom and anti-establishment views. Common punk viewpoints include anti-authoritarianism, a DIY ethic, non-conformity, direct action and not selling out.

There is a wide range of punk fashion, in terms of clothing (including deliberately offensive T-shirts, leather jackets, Doc Marten boots, etc.), hairstyles (including brightly colored hair, spiked hair, mohawks, etc.), cosmetics, tattoos, jewelery and body modification. Early punk fashion adapted everyday objects for aesthetic effect, such as T-shirts, leather jackets (which are often decorated with painted band logos, pins and buttons, and metal studs or spikes), and footwear such as Converse sneakers, skate shoes, brothel creepers, or Dr. Martens boots. Hardcore punk fans adopted a dressed-down style of T-shirts, jeans, combat boots or sneakers and crewcut-style haircuts. Women in the hardcore scene typically wore masculine clothing.