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Chert and Variolite Definition


Variolite and Chert Definition


Definition

Definition
Chert is a hard, dark, opaque sedimentary rock which is composed of silica with an amorphous fine-grained texture   
Variolites are a group of dark green basic igneous rocks which exhibit pale colored spots, or spherules, especially on weathered surfaces, that give them a pockmarked appearance   

History
  
  

Origin
Unknown   
France   

Discoverer
Unknown   
Unknown   

Etymology
From flint-like quartz, 1670s, of unknown origin- a local term, which has been taken into geological use   
From Latin varius, speckled, variegated   

Class
Sedimentary Rocks   
Igneous Rocks   

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

Family
  
  

Group
Not Applicable   
Volcanic   

Other Categories
Fine Grained Rock, Opaque Rock   
Opaque Rock   

Texture >>
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Definition of Chert and Variolite

The general Chert and Variolite definition can be stated as: Chert is a hard, dark, opaque sedimentary rock which is composed of silica with an amorphous fine-grained texture. On the other hand, Variolites are a group of dark green basic igneous rocks which exhibit pale colored spots, or spherules, especially on weathered surfaces, that give them a pockmarked appearance. Along with definition of Chert and Variolite, get to know about Properties of Chert and Variolite. Get to know more information about Chert and Variolite origin and discoverer, etymology and class.

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History of Chert and Variolite

The history of Chert and Variolite 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.

Chert and Variolite Origin and Discoverer

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

Etymology of Chert and Variolite

Along with Chert and Variolite definition, know more about the etymology of Chert and Variolite. Etymology of Chert and Variolite gives information about origin and formation of a particular rock. Know more about Formation of Chert and Formation of Variolite. The etymology of Chert is From flint-like quartz, 1670s, of unknown origin- a local term, which has been taken into geological use while that of Variolite is From flint-like quartz, 1670s, of unknown origin- a local term, which has been taken into geological use. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Chert belongs to Sedimentary Rocks while Variolite belongs to Igneous Rocks. The sub-class, group and other categories of Chert and Variolite are listed below.

For Chert,

For Variolite,

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