Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption
From a Latin word tophous then in Italian tufo and finally tuff
Durable Rock, Medium Hardness Rock
Fine Grained Rock, Opaque Rock
Dull, Vesicular and Foilated
Decorative Aggregates, Entryways, Flooring, Homes, Interior Decoration
As Building Stone, As Facing Stone, Garden Decoration, Office Buildings, Paving Stone
Building houses or walls, Construction Aggregate
Artifacts, Monuments, Sculpture, Small Figurines
Welded tuff, Rhyolitic tuff, Basaltic tuff, Trachyte tuff, Andesitic tuff and Ignimbrite.
Always found as volcanic pipes over deep continental crust
Archaeological Significance
Easter Island in the Polynesian Triangle, Pacific Ocean
Tuff is formed when large masses of ash and sand which are mixed with hot gases are ejected by a volcano and avalanche rapidly down its slopes.
Hydrogen Sulfide, Sulfur Dioxide
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism
Biological Weathering, Chemical Weathering, Mechanical Weathering
Chemical Erosion, Coastal Erosion, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant
Deposits in Eastern Continents
Afghanistan, Armenia, Azerbaijan, Burma, Cambodia, China, India, Indonesia, Iran, Japan, Malaysia, Mongolia, Nepal, North Korea, Pakistan, Saudi Arabia, Syria, Taiwan, Thailand, Turkey, Vietnam, Yemen
Cameroon, Cape Verde, Eritrea, Ethiopia, Kenya, Libya, Madagascar, Nigeria, Rwanda, South Africa, Sudan, Uganda
France, Georgia, Germany, Greece, Iceland, Italy, Netherlands, Poland, Portugal, Spain, United Kingdom
Antarctica, Hawaii Islands
Deposits in Western Continents
Canada, Costa Rica, Panama, USA
Argentina, Bolivia, Brazil, Chile, Ecuador, Paraguay
Deposits in Oceania Continent
Central Australia, Western Australia
Learn more about Properties of Tuff
What is Tuff? In this section, we will learn more about properties of Tuff i.e. physical and thermal properties. Physical properties of Tuff include Color, Streak, Hardness, Structure, Cleavage, Fracture, Luster, Specific Gravity etc. The strength of Tuff is 243.80 N/mm2. Streak of Tuff is white while its cleavage is . Luster of Tuff is vitreous to dull and its fracture is uneven. Tuff is opaque in nature. Know all about Tuff, What is Tuff, its composition, features, facts and reserves in next sections.
Know about Composition of Tuff
What is Tuff composed of? Get to know about composition of Tuff here. Tuff definition gives information about the Formation of Tuff and its composition.The composition of Tuff can be further divided into mineral and compound content. The mineral content of Tuff rock includes Calcite, Chlorite and The compound content of Tuff rock includes Hydrogen Sulfide, Sulfur Dioxide. Almost all rocks undergo transformation process. Know all about Tuff rock in next section.