tuff

Also known as volcanic tuff

thumb|Cliff face of welded tuff pockmarked with holes — some natural, some man-made — from Bandelier National Monument, [[New Mexico]] thumb|Etruscan architecture|Etruscan tuff blocks from a tomb at [[Banditaccia, Italy]] thumb|upright|A house constructed of tuff blocks in Rieden, Rhineland-Palatinate, in the [[Volcanic Eifel region, Germany]]

AI overview

Tuff is a type of rock formed from volcanic ash that has been compacted and sometimes fused together by heat. It has been used historically as a building material, as seen in structures ranging from Etruscan tombs to houses in volcanic regions like Germany and the American Southwest.

AI-generated from the Wikipedia summary — may contain errors.

Key facts

Rock.name: Tuff
Rock.type: Igneous
Rock.image: Guadalupe Tuff.jpg
Rock.caption: Tuff from the Guadalupe Formation in Luzon, Philippines
Rock.composition: Volcanic ash
Rock.composition_secondary: Quartz, feldspars (sanidine, anorthoclase, plagioclase), biotite, pyroxene (augite), hornblende, and magnetite
Rock.class: Mafic to felsic
Rock.texture: Pyroclastic or Eutaxitic

via Wikipedia infobox

Wikidata facts

Image: HoleInTheWallTuff.JPG

Show 2 more facts

Commons category: Tuff
exact match: purl.obolibrary.org/obo/ENVO_01000661

Sources (5)

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~19 min read

Article

22 sections

Contents

Volcanic ash
Transport and lithification
Occurrences
High-silica volcanism
Alkaline volcanism
Intermediate volcanism
Mafic volcanism
Ultramafic volcanism
Kimberlites
Komatiites
Folding and metamorphism
Importance
Italy
Germany
United States
Rapa Nui
Armenia
Tephrochronology
Etymology
See also
References
External links

Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Following ejection and deposition, the ash lithifies into solid rock. Rock that contains greater than 75% ash is considered tuff, while rock containing 25% to 75% ash is described as tuffaceous (for example, tuffaceous sandstone). A pyroclastic rock containing 25–75% volcanic bombs or volcanic blocks is called tuff breccia. Tuff composed of sandy volcanic material can be referred to as volcanic sandstone.