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Trondhjemite and Chert Definition


Chert and Trondhjemite Definition


Definition

Definition
Trondhjemite is a leucocratic (light-colored) intrusive igneous rock. It is a variety of tonalite in which the plagioclase is mostly in the form of oligoclase. Trondhjemites are sometimes known as plagiogranites.   
Chert is a hard, dark, opaque sedimentary rock which is composed of silica with an amorphous fine-grained texture   

History
  
  

Origin
Tonale, Italy   
Unknown   

Discoverer
Unknown   
Unknown   

Etymology
Not Available   
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
Plutonic   
Not Applicable   

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

Texture >>
<< Summary

Definition of Trondhjemite and Chert

The general Trondhjemite and Chert definition can be stated as: Trondhjemite is a leucocratic (light-colored) intrusive igneous rock. It is a variety of tonalite in which the plagioclase is mostly in the form of oligoclase. Trondhjemites are sometimes known as plagiogranites.. 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 Trondhjemite and Chert, get to know about Properties of Trondhjemite and Chert. Get to know more information about Trondhjemite and Chert origin and discoverer, etymology and class.

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History of Trondhjemite and Chert

The history of Trondhjemite 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.

Trondhjemite and Chert Origin and Discoverer

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

Etymology of Trondhjemite and Chert

Along with Trondhjemite and Chert definition, know more about the etymology of Trondhjemite and Chert. Etymology of Trondhjemite and Chert gives information about origin and formation of a particular rock. Know more about Formation of Trondhjemite and Formation of Chert. The etymology of Trondhjemite is not available while that of Chert is not available. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Trondhjemite belongs to Igneous Rocks while Chert belongs to Sedimentary Rocks. The sub-class, group and other categories of Trondhjemite and Chert are listed below.

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