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Rapakivi Granite and Chert Definition


Chert and Rapakivi Granite Definition


Definition

Definition
Rapakivi Granite is a hornblende-biotite Granite containing large rounded crystals of orthoclase which are mantled with oligoclase  
Chert is a hard, dark, opaque sedimentary rock which is composed of silica with an amorphous fine-grained texture  

History
  
  

Origin
Finland, Europe  
-  

Discoverer
Jakob Sederholm  
Unknown  

Etymology
From Finnish Rapakivi which stands for crumbly rock  
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  
-  

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

Texture >>
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Definition of Rapakivi Granite and Chert

The general Rapakivi Granite and Chert definition can be stated as: Rapakivi Granite is a hornblende-biotite Granite containing large rounded crystals of orthoclase which are mantled with oligoclase. 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 Rapakivi Granite and Chert, get to know about Properties of Rapakivi Granite and Chert. Get to know more information about Rapakivi Granite and Chert origin and discoverer, etymology and class.

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History of Rapakivi Granite and Chert

The history of Rapakivi Granite 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.

Rapakivi Granite and Chert Origin and Discoverer

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

Etymology of Rapakivi Granite and Chert

Along with Rapakivi Granite and Chert definition, know more about the etymology of Rapakivi Granite and Chert. Etymology of Rapakivi Granite and Chert gives information about origin and formation of a particular rock. Know more about Formation of Rapakivi Granite and Formation of Chert. The etymology of Rapakivi Granite is From Finnish Rapakivi which stands for crumbly rock while that of Chert is From Finnish Rapakivi which stands for crumbly rock. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Rapakivi Granite belongs to Igneous Rocks while Chert belongs to Sedimentary Rocks. The sub-class, group and other categories of Rapakivi Granite and Chert are listed below.

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