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Comendite and Gneiss Definition


Gneiss and Comendite Definition


Definition

Definition
Comendite is a hard, peralkaline igneous rock, a type of light blue grey rhyolite   
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
Comendite derives its name from the area of Le Commende on San Pietro Island in Italy   
From the Middle High German verb gneist (to spark; so called because the rock glitters)   

Class
Igneous Rocks   
Metamorphic Rocks   

Sub-Class
Durable Rock, Hard Rock   
Durable Rock, Hard Rock   

Family
  
  

Group
Volcanic   
Not Applicable   

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

Texture >>
<< Summary

Definition of Comendite and Gneiss

The general Comendite and Gneiss definition can be stated as: Comendite is a hard, peralkaline igneous rock, a type of light blue grey rhyolite. 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 Comendite and Gneiss, get to know about Properties of Comendite and Gneiss. Get to know more information about Comendite and Gneiss origin and discoverer, etymology and class.

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History of Comendite and Gneiss

The history of Comendite 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.

Comendite and Gneiss Origin and Discoverer

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

Etymology of Comendite and Gneiss

Along with Comendite and Gneiss definition, know more about the etymology of Comendite and Gneiss. Etymology of Comendite and Gneiss gives information about origin and formation of a particular rock. Know more about Formation of Comendite and Formation of Gneiss. The etymology of Comendite is Comendite derives its name from the area of Le Commende on San Pietro Island in Italy while that of Gneiss is Comendite derives its name from the area of Le Commende on San Pietro Island in Italy. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Comendite belongs to Igneous Rocks while Gneiss belongs to Metamorphic Rocks. The sub-class, group and other categories of Comendite and Gneiss are listed below.

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