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Tuff and Gneiss Definition


Gneiss and Tuff Definition


Definition

Definition
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption   
Gneiss is a common and widely distributed type of rock formed by high-grade regional metamorphic processes from pre-existing formations that were originally either igneous or sedimentary rocks   

History
  
  

Origin
Italy   
Unknown   

Discoverer
Unknown   
Unknown   

Etymology
From a Latin word tophous then in Italian tufo and finally tuff   
From the Middle High German verb gneist (to spark; so called because the rock glitters)   

Class
Igneous Rocks   
Metamorphic Rocks   

Sub-Class
Durable Rock, Medium Hardness Rock   
Durable Rock, Hard Rock   

Family
  
  

Group
Volcanic   
Not Applicable   

Other Categories
Fine Grained Rock, Opaque Rock   
Coarse Grained Rock, Medium Grained Rock, Opaque Rock   

Texture >>
<< Summary

Definition of Tuff and Gneiss

The general Tuff and Gneiss definition can be stated as: Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. On the other hand, Gneiss is a common and widely distributed type of rock formed by high-grade regional metamorphic processes from pre-existing formations that were originally either igneous or sedimentary rocks. Along with definition of Tuff and Gneiss, get to know about Properties of Tuff and Gneiss. Get to know more information about Tuff and Gneiss origin and discoverer, etymology and class.

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History of Tuff and Gneiss

The history of Tuff and Gneiss gives information about where the rock was found and who was its discoverer. Almost each and every aspect of Earth's history is recorded in rocks be it the volcanoes which were erupted or the plants, animals and organisms which are now extinct, as rocks are present from millions of years.

Tuff and Gneiss Origin and Discoverer

Tuff and Gneiss definition gives us a brief idea about the two rocks. In some cases, the definition also gives summary about the Formation of Tuff and Gneiss. In this section, you will know about Tuff and Gneiss Origin and Discoverer. Origin of Tuff is Italy whereas Origin of Gneiss is Unknown. It is interesting to know the name of Tuff and Gneiss discoverer. The discoverer of Tuff and Gneiss are Unknown.

Etymology of Tuff and Gneiss

Along with Tuff and Gneiss definition, know more about the etymology of Tuff and Gneiss. Etymology of Tuff and Gneiss gives information about origin and formation of a particular rock. Know more about Formation of Tuff and Formation of Gneiss. The etymology of Tuff is From a Latin word tophous then in Italian tufo and finally tuff while that of Gneiss is From a Latin word tophous then in Italian tufo and finally tuff. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Tuff belongs to Igneous Rocks while Gneiss belongs to Metamorphic Rocks. The sub-class, group and other categories of Tuff and Gneiss are listed below.

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For Gneiss,

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