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Comendite and Chert Definition


Chert and Comendite Definition


Definition

Definition
Comendite is a hard, peralkaline igneous rock, a type of light blue grey rhyolite   
Chert is a hard, dark, opaque sedimentary rock which is composed of silica with an amorphous fine-grained texture   

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 flint-like quartz, 1670s, of unknown origin- a local term, which has been taken into geological use   

Class
Igneous Rocks   
Sedimentary Rocks   

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

Family
  
  

Group
Volcanic   
Not Applicable   

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

Texture >>
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Definition of Comendite and Chert

The general Comendite and Chert definition can be stated as: Comendite is a hard, peralkaline igneous rock, a type of light blue grey rhyolite. On the other hand, Chert is a hard, dark, opaque sedimentary rock which is composed of silica with an amorphous fine-grained texture. Along with definition of Comendite and Chert, get to know about Properties of Comendite and Chert. Get to know more information about Comendite and Chert origin and discoverer, etymology and class.

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History of Comendite and Chert

The history of Comendite and Chert 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 Chert Origin and Discoverer

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

Etymology of Comendite and Chert

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

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