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Tuff and Obsidian Definition


Obsidian and Tuff Definition


Definition

Definition
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption   
Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. It is produced when felsic lava extruded from a volcano cools rapidly with minimum crystal growth   

History
  
  

Origin
Italy   
Ethiopia   

Discoverer
Unknown   
Obsius   

Etymology
From a Latin word tophous then in Italian tufo and finally tuff   
From Latin obsidianus, misprint of Obsianus (lapis) (stone) of Obsius   

Class
Igneous Rocks   
Igneous Rocks   

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

Family
  
  

Group
Volcanic   
Volcanic   

Other Categories
Fine Grained Rock, Opaque Rock   
Opaque Rock   

Texture >>
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Definition of Tuff and Obsidian

The general Tuff and Obsidian 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, Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. It is produced when felsic lava extruded from a volcano cools rapidly with minimum crystal growth. Along with definition of Tuff and Obsidian, get to know about Properties of Tuff and Obsidian. Get to know more information about Tuff and Obsidian origin and discoverer, etymology and class.

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History of Tuff and Obsidian

The history of Tuff and Obsidian 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 Obsidian Origin and Discoverer

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

Etymology of Tuff and Obsidian

Along with Tuff and Obsidian definition, know more about the etymology of Tuff and Obsidian. Etymology of Tuff and Obsidian gives information about origin and formation of a particular rock. Know more about Formation of Tuff and Formation of Obsidian. The etymology of Tuff is From a Latin word tophous then in Italian tufo and finally tuff while that of Obsidian 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 and Obsidian belong to Igneous Rocks. The sub-class, group and other categories of Tuff and Obsidian are listed below.

For Tuff,

For Obsidian,

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